subselect.result 179 KB
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12;
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select (select 2);
(select 2)
2
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explain extended select (select 2);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
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Warnings:
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Note	1249	Select 2 was reduced during optimization
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Note	1003	select 2 AS `(select 2)`
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SELECT (SELECT 1) UNION SELECT (SELECT 2);
(SELECT 1)
1
2
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explain extended SELECT (SELECT 1) UNION SELECT (SELECT 2);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNION RESULT	<union1,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
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Warnings:
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Note	1249	Select 2 was reduced during optimization
Note	1249	Select 4 was reduced during optimization
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Note	1003	select 1 AS `(SELECT 1)` union select 2 AS `(SELECT 2)`
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SELECT (SELECT (SELECT 0 UNION SELECT 0));
(SELECT (SELECT 0 UNION SELECT 0))
0
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explain extended SELECT (SELECT (SELECT 0 UNION SELECT 0));
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
3	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
4	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNION RESULT	<union3,4>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
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Warnings:
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Note	1249	Select 2 was reduced during optimization
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Note	1003	select (select 0 union select 0) AS `(SELECT (SELECT 0 UNION SELECT 0))`
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SELECT (SELECT 1 FROM (SELECT 1) as b HAVING a=1) as a;
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ERROR 42S22: Reference 'a' not supported (forward reference in item list)
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SELECT (SELECT 1 FROM (SELECT 1) as b HAVING b=1) as a,(SELECT 1 FROM (SELECT 1) as c HAVING a=1) as b;
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ERROR 42S22: Reference 'b' not supported (forward reference in item list)
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SELECT (SELECT 1),MAX(1) FROM (SELECT 1) as a;
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(SELECT 1)	MAX(1)
1	1
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SELECT (SELECT a) as a;
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ERROR 42S22: Reference 'a' not supported (forward reference in item list)
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EXPLAIN EXTENDED SELECT 1 FROM (SELECT 1 as a) as b  HAVING (SELECT a)=1;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	1	100.00	
3	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
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Warnings:
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Note	1276	Field or reference 'b.a' of SELECT #3 was resolved in SELECT #1
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Note	1276	Field or reference 'b.a' of SELECT #3 was resolved in SELECT #1
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Note	1003	select 1 AS `1` from dual having ((select '1') = 1)
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SELECT 1 FROM (SELECT 1 as a) as b HAVING (SELECT a)=1;
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1
1
SELECT (SELECT 1), a;
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ERROR 42S22: Unknown column 'a' in 'field list'
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SELECT 1 as a FROM (SELECT 1) as b HAVING (SELECT a)=1;
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a
1
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SELECT 1 FROM (SELECT (SELECT a) b) c;
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ERROR 42S22: Unknown column 'a' in 'field list'
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SELECT * FROM (SELECT 1 as id) b WHERE id IN (SELECT * FROM (SELECT 1 as id) c ORDER BY id);
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id
1
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SELECT * FROM (SELECT 1) a  WHERE 1 IN (SELECT 1,1);
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ERROR 21000: Operand should contain 1 column(s)
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SELECT 1 IN (SELECT 1);
1 IN (SELECT 1)
1
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SELECT 1 FROM (SELECT 1 as a) b WHERE 1 IN (SELECT (SELECT a));
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1
1
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select (SELECT 1 FROM (SELECT 1) a PROCEDURE ANALYSE(1));
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ERROR HY000: Incorrect usage of PROCEDURE and subquery
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SELECT 1 FROM (SELECT 1) a PROCEDURE ANALYSE((SELECT 1));
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ERROR HY000: Incorrect parameters to procedure 'ANALYSE'
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SELECT (SELECT 1) as a FROM (SELECT 1) b WHERE (SELECT a) IS NULL;
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ERROR 42S22: Unknown column 'a' in 'field list'
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SELECT (SELECT 1) as a FROM (SELECT 1) b WHERE (SELECT a) IS NOT NULL;
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ERROR 42S22: Unknown column 'a' in 'field list'
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SELECT (SELECT 1,2,3) = ROW(1,2,3);
(SELECT 1,2,3) = ROW(1,2,3)
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SELECT (SELECT 1,2,3) = ROW(1,2,1);
(SELECT 1,2,3) = ROW(1,2,1)
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SELECT (SELECT 1,2,3) < ROW(1,2,1);
(SELECT 1,2,3) < ROW(1,2,1)
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SELECT (SELECT 1,2,3) > ROW(1,2,1);
(SELECT 1,2,3) > ROW(1,2,1)
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SELECT (SELECT 1,2,3) = ROW(1,2,NULL);
(SELECT 1,2,3) = ROW(1,2,NULL)
NULL
SELECT ROW(1,2,3) = (SELECT 1,2,3);
ROW(1,2,3) = (SELECT 1,2,3)
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SELECT ROW(1,2,3) = (SELECT 1,2,1);
ROW(1,2,3) = (SELECT 1,2,1)
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SELECT ROW(1,2,3) < (SELECT 1,2,1);
ROW(1,2,3) < (SELECT 1,2,1)
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SELECT ROW(1,2,3) > (SELECT 1,2,1);
ROW(1,2,3) > (SELECT 1,2,1)
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SELECT ROW(1,2,3) = (SELECT 1,2,NULL);
ROW(1,2,3) = (SELECT 1,2,NULL)
NULL
SELECT (SELECT 1.5,2,'a') = ROW(1.5,2,'a');
(SELECT 1.5,2,'a') = ROW(1.5,2,'a')
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SELECT (SELECT 1.5,2,'a') = ROW(1.5,2,'b');
(SELECT 1.5,2,'a') = ROW(1.5,2,'b')
0
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SELECT (SELECT 1.5,2,'a') = ROW('1.5b',2,'b');
(SELECT 1.5,2,'a') = ROW('1.5b',2,'b')
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0
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Warnings:
Warning	1292	Truncated incorrect DOUBLE value: '1.5b'
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SELECT (SELECT 'b',2,'a') = ROW(1.5,2,'a');
(SELECT 'b',2,'a') = ROW(1.5,2,'a')
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SELECT (SELECT 1.5,2,'a') = ROW(1.5,'2','a');
(SELECT 1.5,2,'a') = ROW(1.5,'2','a')
1
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SELECT (SELECT 1.5,'c','a') = ROW(1.5,2,'a');
(SELECT 1.5,'c','a') = ROW(1.5,2,'a')
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SELECT (SELECT * FROM (SELECT 'test' a,'test' b) a);
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ERROR 21000: Operand should contain 1 column(s)
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SELECT 1 as a,(SELECT a+a) b,(SELECT b);
a	b	(SELECT b)
1	2	2
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create table t1 (a int);
create table t2 (a int, b int);
create table t3 (a int);
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create table t4 (a int not null, b int not null);
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insert into t1 values (2);
insert into t2 values (1,7),(2,7);
insert into t4 values (4,8),(3,8),(5,9);
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select (select a from t1 where t1.a = a1) as a2, (select b from t2 where t2.b=a2) as a1;
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ERROR 42S22: Reference 'a1' not supported (forward reference in item list)
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select (select a from t1 where t1.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a)	a
NULL	1
2	2
select (select a from t1 where t1.a=t2.b), a from t2;
(select a from t1 where t1.a=t2.b)	a
NULL	1
NULL	2
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select (select a from t1), a, (select 1 union select 2 limit 1) from t2;
(select a from t1)	a	(select 1 union select 2 limit 1)
2	1	1
2	2	1
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select (select a from t3), a from t2;
(select a from t3)	a
NULL	1
NULL	2
select * from t2 where t2.a=(select a from t1);
a	b
2	7
insert into t3 values (6),(7),(3);
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select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1);
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a	b
1	7
2	7
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(select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)) union (select * from t4 order by a limit 2) limit 3;
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a	b
1	7
2	7
3	8
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(select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)) union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
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a	b
1	7
2	7
4	8
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3	8
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explain extended (select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)) union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
3	UNION	t4	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
4	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
NULL	UNION RESULT	<union1,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
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Warnings:
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Note	1003	(select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where (`test`.`t2`.`b` = (select `test`.`t3`.`a` from `test`.`t3` order by 1 desc limit 1))) union (select `test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t4` where (`test`.`t4`.`b` = (select (max(`test`.`t2`.`a`) * 4) from `test`.`t2`)) order by `a`)
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select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2;
(select a from t3 where a<t2.a*4 order by 1 desc limit 1)	a
3	1
7	2
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select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
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(select * from t2 where a>1) as tt;
(select t3.a from t3 where a<8 order by 1 desc limit 1)	a
7	2
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explain extended select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
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(select * from t2 where a>1) as tt;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived3>	system	NULL	NULL	NULL	NULL	1	100.00	
3	DERIVED	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using filesort
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Warnings:
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Note	1003	select (select `test`.`t3`.`a` from `test`.`t3` where (`test`.`t3`.`a` < 8) order by 1 desc limit 1) AS `(select t3.a from t3 where a<8 order by 1 desc limit 1)`,'2' AS `a` from dual
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select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3) order by 1 desc limit 1);
a
2
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a > t1.a) order by 1 desc limit 1);
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select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a < t1.a) order by 1 desc limit 1);
a
select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
b	(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2)
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8	7.5000
8	4.5000
9	7.5000
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explain extended select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
3	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
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Warnings:
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Note	1276	Field or reference 'test.t4.a' of SELECT #3 was resolved in SELECT #1
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Note	1003	select `test`.`t4`.`b` AS `b`,(select avg((`test`.`t2`.`a` + (select min(`test`.`t3`.`a`) from `test`.`t3` where (`test`.`t3`.`a` >= `test`.`t4`.`a`)))) from `test`.`t2`) AS `(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2)` from `test`.`t4`
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select * from t3 where exists (select * from t2 where t2.b=t3.a);
a
7
select * from t3 where not exists (select * from t2 where t2.b=t3.a);
a
6
3
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select * from t3 where a in (select b from t2);
a
7
select * from t3 where a not in (select b from t2);
a
6
3
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select * from t3 where a = some (select b from t2);
a
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select * from t3 where a <> any (select b from t2);
a
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3
select * from t3 where a = all (select b from t2);
a
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select * from t3 where a <> all (select b from t2);
a
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insert into t2 values (100, 5);
select * from t3 where a < any (select b from t2);
a
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3
select * from t3 where a < all (select b from t2);
a
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select * from t3 where a >= any (select b from t2);
a
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7
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explain extended select * from t3 where a >= any (select b from t2);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
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Warnings:
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Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))
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select * from t3 where a >= all (select b from t2);
a
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delete from t2 where a=100;
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select * from t3 where a in (select a,b from t2);
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ERROR 21000: Operand should contain 1 column(s)
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select * from t3 where a in (select * from t2);
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ERROR 21000: Operand should contain 1 column(s)
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insert into t4 values (12,7),(1,7),(10,9),(9,6),(7,6),(3,9),(1,10);
select b,max(a) as ma from t4 group by b having b < (select max(t2.a) from t2 where t2.b=t4.b);
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b	ma
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insert into t2 values (2,10);
select b,max(a) as ma from t4 group by b having ma < (select max(t2.a) from t2 where t2.b=t4.b);
b	ma
10	1
delete from t2 where a=2 and b=10;
select b,max(a) as ma from t4 group by b having b >= (select max(t2.a) from t2 where t2.b=t4.b);
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b	ma
7	12
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create table t5 (a int);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)	a
NULL	1
2	2
insert into t5 values (5);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)	a
NULL	1
2	2
insert into t5 values (2);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)	a
NULL	1
2	2
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explain extended select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DEPENDENT SUBQUERY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
3	DEPENDENT UNION	t5	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
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Warnings:
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Note	1276	Field or reference 'test.t2.a' of SELECT #2 was resolved in SELECT #1
Note	1276	Field or reference 'test.t2.a' of SELECT #3 was resolved in SELECT #1
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Note	1003	select (select '2' from dual where ('2' = `test`.`t2`.`a`) union select `test`.`t5`.`a` from `test`.`t5` where (`test`.`t5`.`a` = `test`.`t2`.`a`)) AS `(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)`,`test`.`t2`.`a` AS `a` from `test`.`t2`
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select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
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ERROR 21000: Subquery returns more than 1 row
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create table t6 (patient_uq int, clinic_uq int, index i1 (clinic_uq));
create table t7( uq int primary key, name char(25));
insert into t7 values(1,"Oblastnaia bolnitsa"),(2,"Bolnitsa Krasnogo Kresta");
insert into t6 values (1,1),(1,2),(2,2),(1,3);
select * from t6 where exists (select * from t7 where uq = clinic_uq);
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patient_uq	clinic_uq
1	1
1	2
2	2
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explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t6	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
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2	DEPENDENT SUBQUERY	t7	eq_ref	PRIMARY	PRIMARY	4	test.t6.clinic_uq	1	100.00	Using index
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Warnings:
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Note	1276	Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
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Note	1003	select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t6` where exists(select 1 from `test`.`t7` where (`test`.`t7`.`uq` = `test`.`t6`.`clinic_uq`))
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select * from t1 where a= (select a from t2,t4 where t2.b=t4.b);
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ERROR 23000: Column 'a' in field list is ambiguous
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drop table t1,t2,t3;
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CREATE TABLE t3 (a varchar(20),b char(1) NOT NULL default '0');
INSERT INTO t3 VALUES ('W','a'),('A','c'),('J','b');
CREATE TABLE t2 (a varchar(20),b int NOT NULL default '0');
INSERT INTO t2 VALUES ('W','1'),('A','3'),('J','2');
CREATE TABLE t1 (a varchar(20),b date NOT NULL default '0000-00-00');
INSERT INTO t1 VALUES ('W','1732-02-22'),('A','1735-10-30'),('J','1743-04-13');
SELECT * FROM t1 WHERE b = (SELECT MIN(b) FROM t1);
a	b
W	1732-02-22
SELECT * FROM t2 WHERE b = (SELECT MIN(b) FROM t2);
a	b
W	1
SELECT * FROM t3 WHERE b = (SELECT MIN(b) FROM t3);
a	b
W	a
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CREATE TABLE `t8` (
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`pseudo` varchar(35) character set latin1 NOT NULL default '',
`email` varchar(60) character set latin1 NOT NULL default '',
PRIMARY KEY  (`pseudo`),
UNIQUE KEY `email` (`email`)
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) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
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INSERT INTO t8 (pseudo,email) VALUES ('joce','test');
INSERT INTO t8 (pseudo,email) VALUES ('joce1','test1');
INSERT INTO t8 (pseudo,email) VALUES ('2joce1','2test1');
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EXPLAIN EXTENDED SELECT pseudo,(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce')) FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce');
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
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1	PRIMARY	t8	const	PRIMARY	PRIMARY	37	const	1	100.00	Using index
4	SUBQUERY	t8	const	PRIMARY	PRIMARY	37		1	100.00	Using index
2	SUBQUERY	t8	const	PRIMARY	PRIMARY	37	const	1	100.00	
3	SUBQUERY	t8	const	PRIMARY	PRIMARY	37		1	100.00	Using index
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Warnings:
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Note	1003	select 'joce' AS `pseudo`,(select 'test' from `test`.`t8` where 1) AS `(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce'))` from `test`.`t8` where 1
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SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo,email FROM
t8 WHERE pseudo='joce');
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ERROR 21000: Operand should contain 1 column(s)
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SELECT pseudo FROM t8 WHERE pseudo=(SELECT * FROM t8 WHERE
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pseudo='joce');
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ERROR 21000: Operand should contain 1 column(s)
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SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce');
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pseudo
joce
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SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo LIKE '%joce%');
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ERROR 21000: Subquery returns more than 1 row
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8;
CREATE TABLE `t1` (
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`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) character set latin1 NOT NULL default '',
PRIMARY KEY  (`pseudo`,`date`,`topic`),
KEY `topic` (`topic`)
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) ENGINE=MyISAM ROW_FORMAT=DYNAMIC;
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INSERT INTO t1 (topic,date,pseudo) VALUES
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('43506','2002-10-02','joce'),('40143','2002-08-03','joce');
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EXPLAIN EXTENDED SELECT DISTINCT date FROM t1 WHERE date='2002-08-03';
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	43	NULL	2	100.00	Using where; Using index
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Warnings:
396
Note	1003	select distinct `test`.`t1`.`date` AS `date` from `test`.`t1` where (`test`.`t1`.`date` = '2002-08-03')
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EXPLAIN EXTENDED SELECT (SELECT DISTINCT date FROM t1 WHERE date='2002-08-03');
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	SUBQUERY	t1	index	NULL	PRIMARY	43	NULL	2	100.00	Using where; Using index
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Warnings:
402
Note	1003	select (select distinct `test`.`t1`.`date` from `test`.`t1` where (`test`.`t1`.`date` = '2002-08-03')) AS `(SELECT DISTINCT date FROM t1 WHERE date='2002-08-03')`
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SELECT DISTINCT date FROM t1 WHERE date='2002-08-03';
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date
2002-08-03
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SELECT (SELECT DISTINCT date FROM t1 WHERE date='2002-08-03');
(SELECT DISTINCT date FROM t1 WHERE date='2002-08-03')
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2002-08-03
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SELECT 1 FROM t1 WHERE 1=(SELECT 1 UNION SELECT 1) UNION ALL SELECT 1;
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1
1
1
1
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SELECT 1 FROM t1 WHERE 1=(SELECT 1 UNION ALL SELECT 1) UNION SELECT 1;
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ERROR 21000: Subquery returns more than 1 row
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EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1=(SELECT 1 UNION SELECT 1);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	topic	3	NULL	2	100.00	Using index
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
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Warnings:
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Note	1003	select 1 AS `1` from `test`.`t1` where 1
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drop table t1;
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CREATE TABLE `t1` (
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`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY  (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
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) ENGINE=MyISAM ROW_FORMAT=FIXED;
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INSERT INTO t1 (numeropost,maxnumrep) VALUES (40143,1),(43506,2);
CREATE TABLE `t2` (
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`mot` varchar(30) NOT NULL default '',
`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) NOT NULL default '',
PRIMARY KEY  (`mot`,`pseudo`,`date`,`topic`)
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) ENGINE=MyISAM ROW_FORMAT=DYNAMIC;
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INSERT INTO t2 (mot,topic,date,pseudo) VALUES ('joce','40143','2002-10-22','joce'), ('joce','43506','2002-10-22','joce');
select numeropost as a FROM t1 GROUP BY (SELECT 1 FROM t1 HAVING a=1);
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a
40143
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SELECT numeropost,maxnumrep FROM t1 WHERE exists (SELECT 1 FROM t2 WHERE (mot='joce') AND date >= '2002-10-21' AND t1.numeropost = t2.topic) ORDER BY maxnumrep DESC LIMIT 0, 20;
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numeropost	maxnumrep
43506	2
40143	1
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SELECT (SELECT 1) as a FROM (SELECT 1 FROM t1 HAVING a=1) b;
448
ERROR 42S22: Unknown column 'a' in 'having clause'
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SELECT 1 IN (SELECT 1 FROM t2 HAVING a);
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ERROR 42S22: Unknown column 'a' in 'having clause'
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SELECT * from t2 where topic IN (SELECT topic FROM t2 GROUP BY topic);
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mot	topic	date	pseudo
joce	40143	2002-10-22	joce
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joce	43506	2002-10-22	joce
SELECT * from t2 where topic IN (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100);
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mot	topic	date	pseudo
SELECT * from t2 where topic IN (SELECT SUM(topic) FROM t1);
mot	topic	date	pseudo
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SELECT * from t2 where topic = any (SELECT topic FROM t2 GROUP BY topic);
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mot	topic	date	pseudo
joce	40143	2002-10-22	joce
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joce	43506	2002-10-22	joce
SELECT * from t2 where topic = any (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100);
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mot	topic	date	pseudo
SELECT * from t2 where topic = any (SELECT SUM(topic) FROM t1);
mot	topic	date	pseudo
467
SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic);
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mot	topic	date	pseudo
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SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100);
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mot	topic	date	pseudo
joce	40143	2002-10-22	joce
472
joce	43506	2002-10-22	joce
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SELECT *, topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100) from t2;
mot	topic	date	pseudo	topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100)
joce	40143	2002-10-22	joce	1
joce	43506	2002-10-22	joce	1
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SELECT * from t2 where topic = all (SELECT SUM(topic) FROM t2);
mot	topic	date	pseudo
SELECT * from t2 where topic <> any (SELECT SUM(topic) FROM t2);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
joce	43506	2002-10-22	joce
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SELECT * from t2 where topic IN (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
SELECT * from t2 where topic = any (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
SELECT *, topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000) from t2;
mot	topic	date	pseudo	topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000)
joce	40143	2002-10-22	joce	1
joce	43506	2002-10-22	joce	0
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drop table t1,t2;
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CREATE TABLE `t1` (
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`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY  (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
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) ENGINE=MyISAM ROW_FORMAT=FIXED;
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INSERT INTO t1 (numeropost,maxnumrep) VALUES (1,0),(2,1);
select numeropost as a FROM t1 GROUP BY (SELECT 1 FROM t1 HAVING a=1);
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ERROR 21000: Subquery returns more than 1 row
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select numeropost as a FROM t1 ORDER BY (SELECT 1 FROM t1 HAVING a=1);
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ERROR 21000: Subquery returns more than 1 row
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drop table t1;
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create table t1 (a int);
insert into t1 values (1),(2),(3);
(select * from t1) union (select * from t1) order by (select a from t1 limit 1);
a
1
2
3
drop table t1;
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CREATE TABLE t1 (field char(1) NOT NULL DEFAULT 'b');
INSERT INTO t1 VALUES ();
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SELECT field FROM t1 WHERE 1=(SELECT 1 UNION ALL SELECT 1 FROM (SELECT 1) a HAVING field='b');
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ERROR 21000: Subquery returns more than 1 row
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drop table t1;
CREATE TABLE `t1` (
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`numeropost` mediumint(8) unsigned NOT NULL default '0',
`numreponse` int(10) unsigned NOT NULL auto_increment,
`pseudo` varchar(35) NOT NULL default '',
PRIMARY KEY  (`numeropost`,`numreponse`),
UNIQUE KEY `numreponse` (`numreponse`),
KEY `pseudo` (`pseudo`,`numeropost`)
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) ENGINE=MyISAM;
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SELECT (SELECT numeropost FROM t1 HAVING numreponse=a),numreponse FROM (SELECT * FROM t1) as a;
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ERROR 42S22: Reference 'numreponse' not supported (forward reference in item list)
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SELECT numreponse, (SELECT numeropost FROM t1 HAVING numreponse=a) FROM (SELECT * FROM t1) as a;
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ERROR 42S22: Unknown column 'a' in 'having clause'
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SELECT numreponse, (SELECT numeropost FROM t1 HAVING numreponse=1) FROM (SELECT * FROM t1) as a;
numreponse	(SELECT numeropost FROM t1 HAVING numreponse=1)
INSERT INTO t1 (numeropost,numreponse,pseudo) VALUES (1,1,'joce'),(1,2,'joce'),(1,3,'test');
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EXPLAIN EXTENDED SELECT numreponse FROM t1 WHERE numeropost='1' AND numreponse=(SELECT 1 FROM t1 WHERE numeropost='1');
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ERROR 21000: Subquery returns more than 1 row
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EXPLAIN EXTENDED SELECT MAX(numreponse) FROM t1 WHERE numeropost='1';
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
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Warnings:
543
Note	1003	select max(`test`.`t1`.`numreponse`) AS `MAX(numreponse)` from `test`.`t1` where (`test`.`t1`.`numeropost` = '1')
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EXPLAIN EXTENDED SELECT numreponse FROM t1 WHERE numeropost='1' AND numreponse=(SELECT MAX(numreponse) FROM t1 WHERE numeropost='1');
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	const	PRIMARY,numreponse	PRIMARY	7	const,const	1	100.00	Using index
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
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Warnings:
549
Note	1003	select '3' AS `numreponse` from `test`.`t1` where (('1' = '1'))
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drop table t1;
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CREATE TABLE t1 (a int(1));
INSERT INTO t1 VALUES (1);
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SELECT 1 FROM (SELECT a FROM t1) b HAVING (SELECT b.a)=1;
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1
1
drop table t1;
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create table t1 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t1 values (0, 10),(1, 11),(2, 12);
insert into t2 values (1, 21),(2, 22),(3, 23);
select * from t1;
a	b
0	10
1	11
2	12
566
update t1 set b= (select b from t1);
567
ERROR HY000: You can't specify target table 't1' for update in FROM clause
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update t1 set b= (select b from t2);
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ERROR 21000: Subquery returns more than 1 row
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update t1 set b= (select b from t2 where t1.a = t2.a);
select * from t1;
a	b
0	NULL
1	21
2	22
drop table t1, t2;
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create table t1 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t1 values (0, 10),(1, 11),(2, 12);
insert into t2 values (1, 21),(2, 12),(3, 23);
select * from t1;
a	b
0	10
1	11
2	12
select * from t1 where b = (select b from t2 where t1.a = t2.a);
a	b
2	12
589
delete from t1 where b = (select b from t1);
590
ERROR HY000: You can't specify target table 't1' for update in FROM clause
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delete from t1 where b = (select b from t2);
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ERROR 21000: Subquery returns more than 1 row
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delete from t1 where b = (select b from t2 where t1.a = t2.a);
select * from t1;
a	b
0	10
1	11
drop table t1, t2;
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create table t11 (a int NOT NULL, b int, primary key (a));
create table t12 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t11 values (0, 10),(1, 11),(2, 12);
insert into t12 values (33, 10),(22, 11),(2, 12);
insert into t2 values (1, 21),(2, 12),(3, 23);
select * from t11;
a	b
0	10
1	11
2	12
select * from t12;
a	b
33	10
22	11
2	12
615
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t12 where t11.a = t12.a);
616
ERROR HY000: You can't specify target table 't12' for update in FROM clause
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delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2);
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ERROR 21000: Subquery returns more than 1 row
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delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2 where t11.a = t2.a);
select * from t11;
a	b
0	10
1	11
select * from t12;
a	b
33	10
22	11
drop table t11, t12, t2;
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CREATE TABLE t1 (x int);
create table t2 (a int);
631
create table t3 (b int);
632
insert into t2 values (1);
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insert into t3 values (1),(2);
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INSERT INTO t1 (x) VALUES ((SELECT x FROM t1));
635
ERROR HY000: You can't specify target table 't1' for update in FROM clause
636
INSERT INTO t1 (x) VALUES ((SELECT b FROM t3));
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ERROR 21000: Subquery returns more than 1 row
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INSERT INTO t1 (x) VALUES ((SELECT a FROM t2));
select * from t1;
x
1
insert into t2 values (1);
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
select * from t1;
x
1
2
INSERT INTO t1 (x) select (SELECT SUM(a)+1 FROM t2) FROM t2;
select * from t1;
x
1
2
3
3
INSERT INTO t1 (x) select (SELECT SUM(x)+2 FROM t1) FROM t2;
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select * from t1;
x
1
2
3
3
11
11
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INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
ERROR 42S22: Unknown column 'x' in 'field list'
666
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
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select * from t1;
x
1
2
3
3
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11
11
675
2
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drop table t1, t2, t3;
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CREATE TABLE t1 (x int not null, y int, primary key (x));
create table t2 (a int);
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create table t3 (a int);
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insert into t2 values (1);
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insert into t3 values (1),(2);
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select * from t1;
x	y
684
replace into t1 (x, y) VALUES ((SELECT x FROM t1), (SELECT a+1 FROM t2));
685
ERROR HY000: You can't specify target table 't1' for update in FROM clause
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replace into t1 (x, y) VALUES ((SELECT a FROM t3), (SELECT a+1 FROM t2));
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ERROR 21000: Subquery returns more than 1 row
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replace into t1 (x, y) VALUES ((SELECT a FROM t2), (SELECT a+1 FROM t2));
select * from t1;
x	y
1	2
replace into t1 (x, y) VALUES ((SELECT a FROM t2), (SELECT a+2 FROM t2));
select * from t1;
x	y
1	3
replace DELAYED into t1 (x, y) VALUES ((SELECT a+3 FROM t2), (SELECT a FROM t2));
select * from t1;
x	y
1	3
4	1
replace DELAYED into t1 (x, y) VALUES ((SELECT a+3 FROM t2), (SELECT a+1 FROM t2));
select * from t1;
x	y
1	3
4	2
replace LOW_PRIORITY into t1 (x, y) VALUES ((SELECT a+1 FROM t2), (SELECT a FROM t2));
select * from t1;
x	y
1	3
4	2
2	1
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drop table t1, t2, t3;
713
SELECT * FROM (SELECT 1) b WHERE 1 IN (SELECT *);
714
ERROR HY000: No tables used
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CREATE TABLE t2 (id int(11) default NULL, KEY id (id)) ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO t2 VALUES (1),(2);
SELECT * FROM t2 WHERE id IN (SELECT 1);
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id
1
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EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ref	id	id	5	const	1	100.00	Using where; Using index
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Warnings:
724
Note	1249	Select 2 was reduced during optimization
725
Note	1003	select `test`.`t2`.`id` AS `id` from `test`.`t2` where (`test`.`t2`.`id` = 1)
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SELECT * FROM t2 WHERE id IN (SELECT 1 UNION SELECT 3);
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id
1
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SELECT * FROM t2 WHERE id IN (SELECT 1+(select 1));
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id
2
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EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1+(select 1));
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ref	id	id	5	const	1	100.00	Using where; Using index
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Warnings:
736 737
Note	1249	Select 3 was reduced during optimization
Note	1249	Select 2 was reduced during optimization
738
Note	1003	select `test`.`t2`.`id` AS `id` from `test`.`t2` where (`test`.`t2`.`id` = <cache>((1 + 1)))
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EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1 UNION SELECT 3);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	NULL	id	5	NULL	2	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
3	DEPENDENT UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
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Warnings:
746
Note	1003	select `test`.`t2`.`id` AS `id` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`id`,<exists>(select 1 having (<cache>(`test`.`t2`.`id`) = <ref_null_helper>(1)) union select 3 having (<cache>(`test`.`t2`.`id`) = <ref_null_helper>(3))))
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SELECT * FROM t2 WHERE id IN (SELECT 5 UNION SELECT 3);
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id
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749
SELECT * FROM t2 WHERE id IN (SELECT 5 UNION SELECT 2);
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id
2
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INSERT INTO t2 VALUES ((SELECT * FROM t2));
753
ERROR HY000: You can't specify target table 't2' for update in FROM clause
754
INSERT INTO t2 VALUES ((SELECT id FROM t2));
755
ERROR HY000: You can't specify target table 't2' for update in FROM clause
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SELECT * FROM t2;
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id
1
2
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CREATE TABLE t1 (id int(11) default NULL, KEY id (id)) ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO t1 values (1),(1);
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UPDATE t2 SET id=(SELECT * FROM t1);
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ERROR 21000: Subquery returns more than 1 row
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drop table t2, t1;
create table t1 (a int);
insert into t1 values (1),(2),(3);
select 1 IN (SELECT * from t1);
1 IN (SELECT * from t1)
1
select 10 IN (SELECT * from t1);
10 IN (SELECT * from t1)
772
0
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select NULL IN (SELECT * from t1);
NULL IN (SELECT * from t1)
775
NULL
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update t1 set a=NULL where a=2;
select 1 IN (SELECT * from t1);
1 IN (SELECT * from t1)
779
1
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select 3 IN (SELECT * from t1);
3 IN (SELECT * from t1)
782
1
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select 10 IN (SELECT * from t1);
10 IN (SELECT * from t1)
785
NULL
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select 1 > ALL (SELECT * from t1);
1 > ALL (SELECT * from t1)
788
0
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select 10 > ALL (SELECT * from t1);
10 > ALL (SELECT * from t1)
791
NULL
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select 1 > ANY (SELECT * from t1);
1 > ANY (SELECT * from t1)
794
NULL
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select 10 > ANY (SELECT * from t1);
10 > ANY (SELECT * from t1)
797
1
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drop table t1;
create table t1 (a varchar(20));
insert into t1 values ('A'),('BC'),('DEF');
select 'A' IN (SELECT * from t1);
'A' IN (SELECT * from t1)
803
1
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unknown committed
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select 'XYZS' IN (SELECT * from t1);
'XYZS' IN (SELECT * from t1)
806
0
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unknown committed
807 808
select NULL IN (SELECT * from t1);
NULL IN (SELECT * from t1)
809
NULL
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unknown committed
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update t1 set a=NULL where a='BC';
select 'A' IN (SELECT * from t1);
'A' IN (SELECT * from t1)
813
1
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unknown committed
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select 'DEF' IN (SELECT * from t1);
'DEF' IN (SELECT * from t1)
816
1
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unknown committed
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select 'XYZS' IN (SELECT * from t1);
'XYZS' IN (SELECT * from t1)
819
NULL
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unknown committed
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select 'A' > ALL (SELECT * from t1);
'A' > ALL (SELECT * from t1)
822
0
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unknown committed
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select 'XYZS' > ALL (SELECT * from t1);
'XYZS' > ALL (SELECT * from t1)
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NULL
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unknown committed
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select 'A' > ANY (SELECT * from t1);
'A' > ANY (SELECT * from t1)
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NULL
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unknown committed
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select 'XYZS' > ANY (SELECT * from t1);
'XYZS' > ANY (SELECT * from t1)
831
1
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unknown committed
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drop table t1;
create table t1 (a float);
insert into t1 values (1.5),(2.5),(3.5);
select 1.5 IN (SELECT * from t1);
1.5 IN (SELECT * from t1)
837
1
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unknown committed
838 839
select 10.5 IN (SELECT * from t1);
10.5 IN (SELECT * from t1)
840
0
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unknown committed
841 842
select NULL IN (SELECT * from t1);
NULL IN (SELECT * from t1)
843
NULL
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unknown committed
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update t1 set a=NULL where a=2.5;
select 1.5 IN (SELECT * from t1);
1.5 IN (SELECT * from t1)
847
1
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unknown committed
848 849
select 3.5 IN (SELECT * from t1);
3.5 IN (SELECT * from t1)
850
1
unknown's avatar
unknown committed
851 852
select 10.5 IN (SELECT * from t1);
10.5 IN (SELECT * from t1)
853
NULL
unknown's avatar
unknown committed
854 855
select 1.5 > ALL (SELECT * from t1);
1.5 > ALL (SELECT * from t1)
856
0
unknown's avatar
unknown committed
857 858
select 10.5 > ALL (SELECT * from t1);
10.5 > ALL (SELECT * from t1)
859
NULL
unknown's avatar
unknown committed
860 861
select 1.5 > ANY (SELECT * from t1);
1.5 > ANY (SELECT * from t1)
862
NULL
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unknown committed
863 864
select 10.5 > ANY (SELECT * from t1);
10.5 > ANY (SELECT * from t1)
865
1
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866
explain extended select (select a+1) from t1;
867 868
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
869
Warnings:
870
Note	1276	Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
871
Note	1249	Select 2 was reduced during optimization
872
Note	1003	select (`test`.`t1`.`a` + 1) AS `(select a+1)` from `test`.`t1`
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873
select (select a+1) from t1;
874 875 876 877
(select a+1)
2.5
NULL
4.5
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unknown committed
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drop table t1;
CREATE TABLE t1 (a int(11) NOT NULL default '0', PRIMARY KEY  (a));
CREATE TABLE t2 (a int(11) default '0', INDEX (a));
INSERT INTO t1 VALUES (1),(2),(3),(4);
INSERT INTO t2 VALUES (1),(2),(3);
SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
a	t1.a in (select t2.a from t2)
1	1
2	1
3	1
4	0
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889
explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
890 891 892
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
2	DEPENDENT SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index
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unknown committed
893
Warnings:
894
Note	1003	select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
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CREATE TABLE t3 (a int(11) default '0');
INSERT INTO t3 VALUES (1),(2),(3);
SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
a	t1.a in (select t2.a from t2,t3 where t3.a=t2.a)
1	1
2	1
3	1
4	0
unknown's avatar
unknown committed
903
explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
904 905
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
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906 907
2	DEPENDENT SUBQUERY	t2	ref_or_null	a	a	5	func	2	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer
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unknown committed
908
Warnings:
909
Note	1003	select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
910
drop table t1,t2,t3;
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911 912
create table t1 (a float);
select 10.5 IN (SELECT * from t1 LIMIT 1);
913
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
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unknown committed
914
select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
915
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
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unknown committed
916
drop table t1;
917 918 919 920 921 922 923 924
create table t1 (a int, b int, c varchar(10));
create table t2 (a int);
insert into t1 values (1,2,'a'),(2,3,'b'),(3,4,'c');
insert into t2 values (1),(2),(NULL);
select a, (select a,b,c from t1 where t1.a=t2.a) = ROW(a,2,'a'),(select c from t1 where a=t2.a)  from t2;
a	(select a,b,c from t1 where t1.a=t2.a) = ROW(a,2,'a')	(select c from t1 where a=t2.a)
1	1	a
2	0	b
925
NULL	NULL	NULL
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select a, (select a,b,c from t1 where t1.a=t2.a) = ROW(a,3,'b'),(select c from t1 where a=t2.a) from t2;
a	(select a,b,c from t1 where t1.a=t2.a) = ROW(a,3,'b')	(select c from t1 where a=t2.a)
1	0	a
2	1	b
NULL	NULL	NULL
select a, (select a,b,c from t1 where t1.a=t2.a) = ROW(a,4,'c'),(select c from t1 where a=t2.a) from t2;
a	(select a,b,c from t1 where t1.a=t2.a) = ROW(a,4,'c')	(select c from t1 where a=t2.a)
1	0	a
2	0	b
935
NULL	NULL	NULL
936
drop table t1,t2;
937 938 939 940 941 942 943
create table t1 (a int, b real, c varchar(10));
insert into t1 values (1, 1, 'a'), (2,2,'b'), (NULL, 2, 'b');
select ROW(1, 1, 'a') IN (select a,b,c from t1);
ROW(1, 1, 'a') IN (select a,b,c from t1)
1
select ROW(1, 2, 'a') IN (select a,b,c from t1);
ROW(1, 2, 'a') IN (select a,b,c from t1)
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944
0
945 946
select ROW(1, 1, 'a') IN (select b,a,c from t1);
ROW(1, 1, 'a') IN (select b,a,c from t1)
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unknown committed
947
1
948 949
select ROW(1, 1, 'a') IN (select a,b,c from t1 where a is not null);
ROW(1, 1, 'a') IN (select a,b,c from t1 where a is not null)
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unknown committed
950
1
951 952
select ROW(1, 2, 'a') IN (select a,b,c from t1 where a is not null);
ROW(1, 2, 'a') IN (select a,b,c from t1 where a is not null)
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unknown committed
953
0
954 955
select ROW(1, 1, 'a') IN (select b,a,c from t1 where a is not null);
ROW(1, 1, 'a') IN (select b,a,c from t1 where a is not null)
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unknown committed
956
1
957 958
select ROW(1, 1, 'a') IN (select a,b,c from t1 where c='b' or c='a');
ROW(1, 1, 'a') IN (select a,b,c from t1 where c='b' or c='a')
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unknown committed
959
1
960 961
select ROW(1, 2, 'a') IN (select a,b,c from t1 where c='b' or c='a');
ROW(1, 2, 'a') IN (select a,b,c from t1 where c='b' or c='a')
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unknown committed
962
0
963 964
select ROW(1, 1, 'a') IN (select b,a,c from t1 where c='b' or c='a');
ROW(1, 1, 'a') IN (select b,a,c from t1 where c='b' or c='a')
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965
1
966
select ROW(1, 1, 'a') IN (select b,a,c from t1 limit 2);
967
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
968 969 970 971
drop table t1;
create table t1 (a int);
insert into t1 values (1);
do @a:=(SELECT a from t1);
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select @a;
@a
1
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975
set @a:=2;
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merge  
unknown committed
976
set @a:=(SELECT a from t1);
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977 978 979
select @a;
@a
1
980 981
drop table t1;
do (SELECT a from t1);
982
ERROR 42S02: Table 'test.t1' doesn't exist
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983
set @a:=(SELECT a from t1);
984
ERROR 42S02: Table 'test.t1' doesn't exist
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CREATE TABLE t1 (a int, KEY(a));
HANDLER t1 OPEN;
HANDLER t1 READ a=((SELECT 1));
988
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT 1))' at line 1
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HANDLER t1 CLOSE;
drop table t1;
create table t1 (a int);
create table t2 (b int);
insert into t1 values (1),(2);
insert into t2 values (1);
select a from t1 where a in (select a from t1 where a in (select b from t2));
a
1
drop table t1, t2;
create table t1 (a int, b int);
create table t2 like t1;
insert into t1 values (1,2),(1,3),(1,4),(1,5);
insert into t2 values (1,2),(1,3);
select * from t1 where row(a,b) in (select a,b from t2);
a	b
1	2
1	3
drop table t1, t2;
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1008
CREATE TABLE `t1` (`i` int(11) NOT NULL default '0',PRIMARY KEY  (`i`)) ENGINE=MyISAM CHARSET=latin1;
1009 1010
INSERT INTO t1 VALUES (1);
UPDATE t1 SET i=i+1 WHERE i=(SELECT MAX(i));
1011 1012
select * from t1;
i
1013
2
1014
drop table t1;
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1015
CREATE TABLE t1 (a int(1));
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1016
EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
1017 1018 1019
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
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1020
Warnings:
1021
Note	1003	select (select rand() from `test`.`t1`) AS `(SELECT RAND() FROM t1)` from `test`.`t1`
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1022
EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
1023 1024 1025
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
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unknown committed
1026
Warnings:
1027
Note	1003	select (select encrypt('test') from `test`.`t1`) AS `(SELECT ENCRYPT('test') FROM t1)` from `test`.`t1`
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1028
EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
1029 1030 1031
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
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unknown committed
1032
Warnings:
1033
Note	1003	select (select benchmark(1,1) from `test`.`t1`) AS `(SELECT BENCHMARK(1,1) FROM t1)` from `test`.`t1`
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unknown committed
1034
drop table t1;
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CREATE TABLE `t1` (
`mot` varchar(30) character set latin1 NOT NULL default '',
`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) character set latin1 NOT NULL default '',
PRIMARY KEY  (`mot`,`pseudo`,`date`,`topic`),
KEY `pseudo` (`pseudo`,`date`,`topic`),
KEY `topic` (`topic`)
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1043
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
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CREATE TABLE `t2` (
`mot` varchar(30) character set latin1 NOT NULL default '',
`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) character set latin1 NOT NULL default '',
PRIMARY KEY  (`mot`,`pseudo`,`date`,`topic`),
KEY `pseudo` (`pseudo`,`date`,`topic`),
KEY `topic` (`topic`)
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1052
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
1053 1054 1055 1056 1057
CREATE TABLE `t3` (
`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY  (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
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1058
) ENGINE=MyISAM CHARSET=latin1;
1059
INSERT INTO t1 VALUES ('joce','1','','joce'),('test','2','','test');
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unknown committed
1060
Warnings:
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1061 1062
Warning	1265	Data truncated for column 'date' at row 1
Warning	1265	Data truncated for column 'date' at row 2
1063
INSERT INTO t2 VALUES ('joce','1','','joce'),('test','2','','test');
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unknown committed
1064
Warnings:
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1065 1066
Warning	1265	Data truncated for column 'date' at row 1
Warning	1265	Data truncated for column 'date' at row 2
1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
INSERT INTO t3 VALUES (1,1);
SELECT DISTINCT topic FROM t2 WHERE NOT EXISTS(SELECT * FROM t3 WHERE
numeropost=topic);
topic
2
select * from t1;
mot	topic	date	pseudo
joce	1	0000-00-00	joce
test	2	0000-00-00	test
DELETE FROM t1 WHERE topic IN (SELECT DISTINCT topic FROM t2 WHERE NOT
EXISTS(SELECT * FROM t3 WHERE numeropost=topic));
select * from t1;
mot	topic	date	pseudo
joce	1	0000-00-00	joce
drop table t1, t2, t3;
1082 1083 1084 1085 1086 1087 1088
SELECT * FROM (SELECT 1 as a,(SELECT a)) a;
a	(SELECT a)
1	1
CREATE TABLE t1 SELECT * FROM (SELECT 1 as a,(SELECT 1)) a;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
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  `a` int(1) NOT NULL DEFAULT '0',
  `(SELECT 1)` int(1) NOT NULL DEFAULT '0'
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
1092 1093 1094 1095 1096
drop table t1;
CREATE TABLE t1 SELECT * FROM (SELECT 1 as a,(SELECT a)) a;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
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  `a` int(1) NOT NULL DEFAULT '0',
  `(SELECT a)` int(1) NOT NULL DEFAULT '0'
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unknown committed
1099
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1100 1101 1102 1103 1104
drop table t1;
CREATE TABLE t1 SELECT * FROM (SELECT 1 as a,(SELECT a+0)) a;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
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  `a` int(1) NOT NULL DEFAULT '0',
  `(SELECT a+0)` int(3) NOT NULL DEFAULT '0'
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1107
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1108 1109
drop table t1;
CREATE TABLE t1 SELECT (SELECT 1 as a UNION SELECT 1+1 limit 1,1) as a;
1110 1111 1112
select * from t1;
a
2
1113 1114 1115
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
1116
  `a` bigint(20) NOT NULL DEFAULT '0'
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unknown committed
1117
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1118
drop table t1;
1119 1120
create table t1 (a int);
insert into t1 values (1), (2), (3);
unknown's avatar
unknown committed
1121
explain extended select a,(select (select rand() from t1 limit 1)  from t1 limit 1)
1122
from t1;
1123 1124 1125 1126
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	UNCACHEABLE SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
3	UNCACHEABLE SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
unknown's avatar
unknown committed
1127
Warnings:
1128
Note	1003	select `test`.`t1`.`a` AS `a`,(select (select rand() from `test`.`t1` limit 1) from `test`.`t1` limit 1) AS `(select (select rand() from t1 limit 1)  from t1 limit 1)` from `test`.`t1`
1129
drop table t1;
1130
select t1.Continent, t2.Name, t2.Population from t1 LEFT JOIN t2 ON t1.Code = t2.Country  where t2.Population IN (select max(t2.Population) AS Population from t2, t1 where t2.Country = t1.Code group by Continent);
1131
ERROR 42S02: Table 'test.t1' doesn't exist
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CREATE TABLE t1 (
ID int(11) NOT NULL auto_increment,
name char(35) NOT NULL default '',
t2 char(3) NOT NULL default '',
District char(20) NOT NULL default '',
Population int(11) NOT NULL default '0',
PRIMARY KEY  (ID)
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) ENGINE=MyISAM;
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INSERT INTO t1 VALUES (130,'Sydney','AUS','New South Wales',3276207);
INSERT INTO t1 VALUES (131,'Melbourne','AUS','Victoria',2865329);
INSERT INTO t1 VALUES (132,'Brisbane','AUS','Queensland',1291117);
CREATE TABLE t2 (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
Continent enum('Asia','Europe','North America','Africa','Oceania','Antarctica','South America') NOT NULL default 'Asia',
Region char(26) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
IndepYear smallint(6) default NULL,
Population int(11) NOT NULL default '0',
LifeExpectancy float(3,1) default NULL,
GNP float(10,2) default NULL,
GNPOld float(10,2) default NULL,
LocalName char(45) NOT NULL default '',
GovernmentForm char(45) NOT NULL default '',
HeadOfState char(60) default NULL,
Capital int(11) default NULL,
Code2 char(2) NOT NULL default '',
PRIMARY KEY  (Code)
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) ENGINE=MyISAM;
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INSERT INTO t2 VALUES ('AUS','Australia','Oceania','Australia and New Zealand',7741220.00,1901,18886000,79.8,351182.00,392911.00,'Australia','Constitutional Monarchy, Federation','Elisabeth II',135,'AU');
1162
INSERT INTO t2 VALUES ('AZE','Azerbaijan','Asia','Middle East',86600.00,1991,7734000,62.9,4127.00,4100.00,'Azärbaycan','Federal Republic','Heydär Äliyev',144,'AZ');
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select t2.Continent, t1.Name, t1.Population from t2 LEFT JOIN t1 ON t2.Code = t1.t2  where t1.Population IN (select max(t1.Population) AS Population from t1, t2 where t1.t2 = t2.Code group by Continent);
Continent	Name	Population
Oceania	Sydney	3276207
drop table t1, t2;
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CREATE TABLE `t1` (
`id` mediumint(8) unsigned NOT NULL auto_increment,
`pseudo` varchar(35) character set latin1 NOT NULL default '',
PRIMARY KEY  (`id`),
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UNIQUE KEY `pseudo` (`pseudo`)
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) ENGINE=MyISAM PACK_KEYS=1 ROW_FORMAT=DYNAMIC;
1173 1174 1175 1176
INSERT INTO t1 (pseudo) VALUES ('test');
SELECT 0 IN (SELECT 1 FROM t1 a);
0 IN (SELECT 1 FROM t1 a)
0
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EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a);
1178 1179 1180
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
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1181
Warnings:
1182
Note	1003	select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)`
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INSERT INTO t1 (pseudo) VALUES ('test1');
SELECT 0 IN (SELECT 1 FROM t1 a);
0 IN (SELECT 1 FROM t1 a)
0
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1187
EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
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Warnings:
1192
Note	1003	select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)`
1193
drop table t1;
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CREATE TABLE `t1` (
`i` int(11) NOT NULL default '0',
PRIMARY KEY  (`i`)
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) ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO t1 VALUES (1);
UPDATE t1 SET i=i+(SELECT MAX(i) FROM (SELECT 1) t) WHERE i=(SELECT MAX(i));
UPDATE t1 SET i=i+1 WHERE i=(SELECT MAX(i));
1201
UPDATE t1 SET t.i=i+(SELECT MAX(i) FROM (SELECT 1) t);
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1202
ERROR 42S22: Unknown column 't.i' in 'field list'
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select * from t1;
i
1205
3
1206
drop table t1;
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CREATE TABLE t1 (
id int(11) default NULL
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) ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO t1 VALUES (1),(1),(2),(2),(1),(3);
CREATE TABLE t2 (
id int(11) default NULL,
name varchar(15) default NULL
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) ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO t2 VALUES (4,'vita'), (1,'vita'), (2,'vita'), (1,'vita');
update t1, t2 set t2.name='lenka' where t2.id in (select id from t1);
select * from t2;
id	name
4	vita
1	lenka
2	lenka
1	lenka
drop table t1,t2;
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create table t1 (a int, unique index indexa (a));
insert into t1 values (-1), (-4), (-2), (NULL);
select -10 IN (select a from t1 FORCE INDEX (indexa));
-10 IN (select a from t1 FORCE INDEX (indexa))
NULL
drop table t1;
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create table t1 (id int not null auto_increment primary key, salary int, key(salary));
insert into t1 (salary) values (100),(1000),(10000),(10),(500),(5000),(50000);
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1232
explain extended SELECT id FROM t1 where salary = (SELECT MAX(salary) FROM t1);
1233 1234 1235
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ref	salary	salary	5	const	1	100.00	Using where
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
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1236
Warnings:
1237
Note	1003	select `test`.`t1`.`id` AS `id` from `test`.`t1` where (`test`.`t1`.`salary` = (select max(`test`.`t1`.`salary`) from `test`.`t1`))
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1238
drop table t1;
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CREATE TABLE t1 (
ID int(10) unsigned NOT NULL auto_increment,
SUB_ID int(3) unsigned NOT NULL default '0',
REF_ID int(10) unsigned default NULL,
REF_SUB int(3) unsigned default '0',
PRIMARY KEY (ID,SUB_ID),
UNIQUE KEY t1_PK (ID,SUB_ID),
KEY t1_FK (REF_ID,REF_SUB),
KEY t1_REFID (REF_ID)
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) ENGINE=MyISAM CHARSET=cp1251;
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INSERT INTO t1 VALUES (1,0,NULL,NULL),(2,0,NULL,NULL);
SELECT DISTINCT REF_ID FROM t1 WHERE ID= (SELECT DISTINCT REF_ID FROM t1 WHERE ID=2);
REF_ID
DROP TABLE t1;
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create table t1 (a int, b int);
create table t2 (a int, b int);
insert into t1 values (1,0), (2,0), (3,0);
insert into t2 values (1,1), (2,1), (3,1), (2,2);
update ignore t1 set b=(select b from t2 where t1.a=t2.a);
Warnings:
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1259
Error	1242	Subquery returns more than 1 row
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select * from t1;
a	b
1	1
2	NULL
3	1
drop table t1, t2;
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CREATE TABLE `t1` (
`id` mediumint(8) unsigned NOT NULL auto_increment,
`pseudo` varchar(35) NOT NULL default '',
`email` varchar(60) NOT NULL default '',
PRIMARY KEY  (`id`),
UNIQUE KEY `email` (`email`),
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UNIQUE KEY `pseudo` (`pseudo`)
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) ENGINE=MyISAM CHARSET=latin1 PACK_KEYS=1 ROW_FORMAT=DYNAMIC;
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INSERT INTO t1 (id,pseudo,email) VALUES (1,'test','test'),(2,'test1','test1');
SELECT pseudo as a, pseudo as b FROM t1 GROUP BY (SELECT a) ORDER BY (SELECT id*1);
a	b
test	test
test1	test1
drop table if exists t1;
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(SELECT 1 as a) UNION (SELECT 1) ORDER BY (SELECT a+0);
a
1
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create table t1 (a int not null, b int, primary key (a));
create table t2 (a int not null, primary key (a));
create table t3 (a int not null, b int, primary key (a));
insert into t1 values (1,10), (2,20), (3,30),  (4,40);
insert into t2 values (2), (3), (4), (5);
insert into t3 values (10,3), (20,4), (30,5);
select * from t2 where t2.a in (select a from t1);
a
2
3
4
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1294
explain extended select * from t2 where t2.a in (select a from t1);
1295 1296 1297
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	NULL	PRIMARY	4	NULL	4	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
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1298
Warnings:
1299
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(<primary_index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on PRIMARY)))
1300 1301 1302 1303
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a
2
4
unknown's avatar
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1304
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
1305 1306
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	NULL	PRIMARY	4	NULL	4	100.00	Using where; Using index
1307
2	DEPENDENT SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using where
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1308
Warnings:
1309
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(<primary_index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on PRIMARY where ((`test`.`t1`.`b` <> 30) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))))
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select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
a
2
3
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1314
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
1315 1316
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	NULL	PRIMARY	4	NULL	4	100.00	Using where; Using index
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1317
2	DEPENDENT SUBQUERY	t1	eq_ref	PRIMARY	PRIMARY	4	func	1	100.00	
1318
2	DEPENDENT SUBQUERY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t1.b	1	100.00	Using index
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1319
Warnings:
1320
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))
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drop table t1, t2, t3;
1322
create table t1 (a int, b int, index a (a,b));
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create table t2 (a int, index a (a));
create table t3 (a int, b int, index a (a));
insert into t1 values (1,10), (2,20), (3,30), (4,40);
insert into t2 values (2), (3), (4), (5);
insert into t3 values (10,3), (20,4), (30,5);
select * from t2 where t2.a in (select a from t1);
a
2
3
4
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1333
explain extended select * from t2 where t2.a in (select a from t1);
1334 1335
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	NULL	a	5	NULL	4	100.00	Using where; Using index
1336
2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	1001	100.00	Using index; Using where
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1337
Warnings:
1338
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a where (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))
1339 1340 1341 1342
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a
2
4
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1343
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
1344 1345 1346
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	NULL	a	5	NULL	4	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	1001	100.00	Using index; Using where
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unknown committed
1347
Warnings:
1348
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a where ((`test`.`t1`.`b` <> 30) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))))
1349 1350 1351 1352
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
a
2
3
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1353
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
1354 1355
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	NULL	a	5	NULL	4	100.00	Using where; Using index
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1356 1357
2	DEPENDENT SUBQUERY	t1	ref	a	a	5	func	1001	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t3	index	a	a	5	NULL	3	100.00	Using where; Using index; Using join buffer
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1358
Warnings:
1359
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))
1360 1361 1362 1363 1364 1365 1366 1367 1368 1369
insert into t1 values (3,31);
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a
2
3
4
select * from t2 where t2.a in (select a from t1 where t1.b <> 30 and t1.b <> 31);
a
2
4
unknown's avatar
unknown committed
1370
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
1371 1372 1373
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	NULL	a	5	NULL	4	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	1001	100.00	Using index; Using where
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unknown committed
1374
Warnings:
1375
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a where ((`test`.`t1`.`b` <> 30) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))))
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drop table t1, t2, t3;
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create table t1 (a int, b int);
create table t2 (a int, b int);
create table t3 (a int, b int);
insert into t1 values (0,100),(1,2), (1,3), (2,2), (2,7), (2,-1), (3,10);
insert into t2 values (0,0), (1,1), (2,1), (3,1), (4,1);
insert into t3 values (3,3), (2,2), (1,1);
select a,(select count(distinct t1.b) as sum from t1,t2 where t1.a=t2.a and t2.b > 0 and t1.a <= t3.b group by t1.a order by sum limit 1) from t3;
a	(select count(distinct t1.b) as sum from t1,t2 where t1.a=t2.a and t2.b > 0 and t1.a <= t3.b group by t1.a order by sum limit 1)
3	1
2	2
1	2
drop table t1,t2,t3;
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create table t1 (s1 int);
create table t2 (s1 int);
insert into t1 values (1);
insert into t2 values (1);
select * from t1 where exists (select s1 from t2 having max(t2.s1)=t1.s1);
s1
1395
1
1396
drop table t1,t2;
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merge  
unknown committed
1397 1398 1399 1400
create table t1 (s1 int);
create table t2 (s1 int);
insert into t1 values (1);
insert into t2 values (1);
1401
update t1 set  s1 = s1 + 1 where 1 = (select x.s1 as A from t2 WHERE t2.s1 > t1.s1 order by A);
1402
ERROR 42S22: Unknown column 'x.s1' in 'field list'
1403
DROP TABLE t1, t2;
1404 1405 1406 1407 1408 1409
CREATE TABLE t1 (s1 CHAR(5) COLLATE latin1_german1_ci,
s2 CHAR(5) COLLATE latin1_swedish_ci);
INSERT INTO t1 VALUES ('z','?');
select * from t1 where s1 > (select max(s2) from t1);
ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '>'
select * from t1 where s1 > any (select max(s2) from t1);
unknown's avatar
merge  
unknown committed
1410
ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '>'
1411
drop table t1;
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create table t1(toid int,rd int);
create table t2(userid int,pmnew int,pmtotal int);
insert into t2 values(1,0,0),(2,0,0);
insert into t1 values(1,0),(1,0),(1,0),(1,12),(1,15),(1,123),(1,12312),(1,12312),(1,123),(2,0),(2,0),(2,1),(2,2);
select userid,pmtotal,pmnew, (select count(rd) from t1 where toid=t2.userid) calc_total, (select count(rd) from t1 where rd=0 and toid=t2.userid) calc_new from t2 where userid in (select distinct toid from t1);
userid	pmtotal	pmnew	calc_total	calc_new
1	0	0	9	3
2	0	0	4	2
drop table t1, t2;
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1421 1422
create table t1 (s1 char(5));
select (select 'a','b' from t1 union select 'a','b' from t1) from t1;
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1423
ERROR 21000: Operand should contain 1 column(s)
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1424 1425 1426 1427
insert into t1 values ('tttt');
select * from t1 where ('a','b')=(select 'a','b' from t1 union select 'a','b' from t1);
s1
tttt
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1428
explain extended (select * from t1);
1429 1430
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	1	100.00	
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1431
Warnings:
1432
Note	1003	(select 'tttt' AS `s1` from dual)
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1433 1434 1435
(select * from t1);
s1
tttt
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1436
drop table t1;
1437
create table t1 (s1 char(5), index s1(s1));
1438 1439 1440 1441 1442 1443 1444 1445
create table t2 (s1 char(5), index s1(s1));
insert into t1 values ('a1'),('a2'),('a3');
insert into t2 values ('a1'),('a2');
select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
s1	s1 NOT IN (SELECT s1 FROM t2)
a1	0
a2	0
a3	1
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1446 1447 1448 1449 1450 1451 1452 1453 1454 1455
select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
s1	s1 = ANY (SELECT s1 FROM t2)
a1	1
a2	1
a3	0
select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
s1	s1 <> ALL (SELECT s1 FROM t2)
a1	0
a2	0
a3	1
1456 1457 1458 1459 1460
select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
s1	s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')
a1	0
a2	1
a3	1
unknown's avatar
unknown committed
1461
explain extended select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
1462 1463
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
1464
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
1465
Warnings:
1466
Note	1003	select `test`.`t1`.`s1` AS `s1`,(not(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(<is_not_null_test>(`test`.`t2`.`s1`))))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
1467
explain extended select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
1468 1469
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
1470
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
1471
Warnings:
1472
Note	1003	select `test`.`t1`.`s1` AS `s1`,<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(<is_not_null_test>(`test`.`t2`.`s1`))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
1473
explain extended select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
1474 1475
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
1476
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
unknown's avatar
unknown committed
1477
Warnings:
1478
Note	1003	select `test`.`t1`.`s1` AS `s1`,(not(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(<is_not_null_test>(`test`.`t2`.`s1`))))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
unknown's avatar
unknown committed
1479
explain extended select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
1480 1481
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
1482
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
unknown's avatar
unknown committed
1483
Warnings:
1484
Note	1003	select `test`.`t1`.`s1` AS `s1`,(not(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where (`test`.`t2`.`s1` < 'a2') having trigcond(<is_not_null_test>(`test`.`t2`.`s1`))))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
1485
drop table t1,t2;
1486 1487 1488 1489 1490 1491 1492 1493
create table t2 (a int, b int);
create table t3 (a int);
insert into t3 values (6),(7),(3);
select * from t3 where a >= all (select b from t2);
a
6
7
3
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1494
explain extended select * from t3 where a >= all (select b from t2);
1495 1496 1497
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
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unknown committed
1498
Warnings:
1499
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`)))
1500 1501 1502
select * from t3 where a >= some (select b from t2);
a
explain extended select * from t3 where a >= some (select b from t2);
1503 1504 1505
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
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Warnings:
1507
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`)))
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select * from t3 where a >= all (select b from t2 group by 1);
a
6
7
3
explain extended select * from t3 where a >= all (select b from t2 group by 1);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
1517
Warnings:
1518
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1)))
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select * from t3 where a >= some (select b from t2 group by 1);
a
explain extended select * from t3 where a >= some (select b from t2 group by 1);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
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Warnings:
1526
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1)))
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select * from t3 where NULL >= any (select b from t2);
a
explain extended select * from t3 where NULL >= any (select b from t2);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
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Warnings:
1534
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
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select * from t3 where NULL >= any (select b from t2 group by 1);
a
explain extended select * from t3 where NULL >= any (select b from t2 group by 1);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
1541
Warnings:
1542
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
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select * from t3 where NULL >= some (select b from t2);
a
explain extended select * from t3 where NULL >= some (select b from t2);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
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Warnings:
1550
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
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select * from t3 where NULL >= some (select b from t2 group by 1);
a
explain extended select * from t3 where NULL >= some (select b from t2 group by 1);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
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Warnings:
1558
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
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insert into t2 values (2,2), (2,1), (3,3), (3,1);
select * from t3 where a > all (select max(b) from t2 group by a);
a
6
7
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unknown committed
1564
explain extended select * from t3 where a > all (select max(b) from t2 group by a);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	4	100.00	Using temporary; Using filesort
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1568
Warnings:
1569
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`)))
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drop table t2, t3;
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1571
CREATE TABLE `t1` ( `id` mediumint(9) NOT NULL auto_increment, `taskid` bigint(20) NOT NULL default '0', `dbid` int(11) NOT NULL default '0', `create_date` datetime NOT NULL default '0000-00-00 00:00:00', `last_update` datetime NOT NULL default '0000-00-00 00:00:00', PRIMARY KEY  (`id`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=3 ;
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INSERT INTO `t1` (`id`, `taskid`, `dbid`, `create_date`,`last_update`) VALUES (1, 1, 15, '2003-09-29 10:31:36', '2003-09-29 10:31:36'), (2, 1, 21, now(), now());
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CREATE TABLE `t2` (`db_id` int(11) NOT NULL auto_increment,`name` varchar(200) NOT NULL default '',`primary_uid` smallint(6) NOT NULL default '0',`secondary_uid` smallint(6) NOT NULL default '0',PRIMARY KEY  (`db_id`),UNIQUE KEY `name_2` (`name`),FULLTEXT KEY `name` (`name`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=2147483647;
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INSERT INTO `t2` (`db_id`, `name`, `primary_uid`, `secondary_uid`) VALUES (18, 'Not Set 1', 0, 0),(19, 'Valid', 1, 2),(20, 'Valid 2', 1, 2),(21, 'Should Not Return', 1, 2),(26, 'Not Set 2', 0, 0),(-1, 'ALL DB\'S', 0, 0);
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CREATE TABLE `t3` (`taskgenid` mediumint(9) NOT NULL auto_increment,`dbid` int(11) NOT NULL default '0',`taskid` int(11) NOT NULL default '0',`mon` tinyint(4) NOT NULL default '1',`tues` tinyint(4) NOT NULL default '1',`wed` tinyint(4) NOT NULL default '1',`thur` tinyint(4) NOT NULL default '1',`fri` tinyint(4) NOT NULL default '1',`sat` tinyint(4) NOT NULL default '0',`sun` tinyint(4) NOT NULL default '0',`how_often` smallint(6) NOT NULL default '1',`userid` smallint(6) NOT NULL default '0',`active` tinyint(4) NOT NULL default '1',PRIMARY KEY  (`taskgenid`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=2 ;
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INSERT INTO `t3` (`taskgenid`, `dbid`, `taskid`, `mon`, `tues`,`wed`, `thur`, `fri`, `sat`, `sun`, `how_often`, `userid`, `active`) VALUES (1,-1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 1);
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CREATE TABLE `t4` (`task_id` smallint(6) NOT NULL default '0',`description` varchar(200) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO `t4` (`task_id`, `description`) VALUES (1, 'Daily Check List'),(2, 'Weekly Status');
select  dbid, name, (date_format(now() , '%Y-%m-%d') - INTERVAL how_often DAY) >= ifnull((SELECT date_format(max(create_date),'%Y-%m-%d') FROM t1 WHERE dbid = b.db_id AND taskid = a.taskgenid), '1950-01-01') from t3 a, t2 b, t4  WHERE dbid = - 1 AND primary_uid = '1' AND t4.task_id = taskid;
dbid	name	(date_format(now() , '%Y-%m-%d') - INTERVAL how_often DAY) >= ifnull((SELECT date_format(max(create_date),'%Y-%m-%d') FROM t1 WHERE dbid = b.db_id AND taskid = a.taskgenid), '1950-01-01')
-1	Valid	1
-1	Valid 2	1
-1	Should Not Return	0
SELECT dbid, name FROM t3 a, t2 b, t4 WHERE dbid = - 1 AND primary_uid = '1' AND ((date_format(now() , '%Y-%m-%d') - INTERVAL how_often DAY) >= ifnull((SELECT date_format(max(create_date),'%Y-%m-%d') FROM t1 WHERE dbid = b.db_id AND taskid = a.taskgenid), '1950-01-01')) AND t4.task_id = taskid;
dbid	name
-1	Valid
-1	Valid 2
drop table t1,t2,t3,t4;
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CREATE TABLE t1 (id int(11) default NULL) ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO t1 VALUES (1),(5);
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CREATE TABLE t2 (id int(11) default NULL) ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO t2 VALUES (2),(6);
select * from t1 where (1,2,6) in (select * from t2);
ERROR 21000: Operand should contain 3 column(s)
DROP TABLE t1,t2;
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create table t1 (s1 int);
insert into t1 values (1);
insert into t1 values (2);
set sort_buffer_size = (select s1 from t1);
ERROR 21000: Subquery returns more than 1 row
do (select * from t1);
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Warnings:
Error	1242	Subquery returns more than 1 row
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drop table t1;
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create table t1 (s1 char);
insert into t1 values ('e');
select * from t1 where 'f' > any (select s1 from t1);
s1
e
select * from t1 where 'f' > any (select s1 from t1 union select s1 from t1);
s1
e
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explain extended select * from t1 where 'f' > any (select s1 from t1 union select s1 from t1);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
2	SUBQUERY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
3	UNION	t1	system	NULL	NULL	NULL	NULL	1	100.00	
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
1619
Warnings:
1620
Note	1003	select 'e' AS `s1` from dual where 1
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drop table t1;
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CREATE TABLE t1 (number char(11) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO t1 VALUES ('69294728265'),('18621828126'),('89356874041'),('95895001874');
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CREATE TABLE t2 (code char(5) NOT NULL default '',UNIQUE KEY code (code)) ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO t2 VALUES ('1'),('1226'),('1245'),('1862'),('18623'),('1874'),('1967'),('6');
select c.number as phone,(select p.code from t2 p where c.number like concat(p.code, '%') order by length(p.code) desc limit 1) as code from t1 c;
phone	code
69294728265	6
18621828126	1862
89356874041	NULL
95895001874	NULL
drop table t1, t2;
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create table t1 (s1 int);
create table t2 (s1 int);
select * from t1 where (select count(*) from t2 where t1.s2) = 1;
ERROR 42S22: Unknown column 't1.s2' in 'where clause'
select * from t1 where (select count(*) from t2 group by t1.s2) = 1;
ERROR 42S22: Unknown column 't1.s2' in 'group statement'
select count(*) from t2 group by t1.s2;
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1640
ERROR 42S22: Unknown column 't1.s2' in 'group statement'
1641
drop table t1, t2;
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CREATE TABLE t1(COLA FLOAT NOT NULL,COLB FLOAT NOT NULL,COLC VARCHAR(20) DEFAULT NULL,PRIMARY KEY (COLA, COLB));
CREATE TABLE t2(COLA FLOAT NOT NULL,COLB FLOAT NOT NULL,COLC CHAR(1) NOT NULL,PRIMARY KEY (COLA));
INSERT INTO t1 VALUES (1,1,'1A3240'), (1,2,'4W2365');
INSERT INTO t2 VALUES (100, 200, 'C');
SELECT DISTINCT COLC FROM t1 WHERE COLA = (SELECT COLA FROM t2 WHERE COLB = 200 AND COLC ='C' LIMIT 1);
COLC
DROP TABLE t1, t2;
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CREATE TABLE t1 (a int(1));
INSERT INTO t1 VALUES (1),(1),(1),(1),(1),(2),(3),(4),(5);
SELECT DISTINCT (SELECT a) FROM t1 LIMIT 100;
(SELECT a)
1
2
3
4
5
DROP TABLE t1;
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create table t1 (a int, b decimal(13, 3));
insert into t1 values (1, 0.123);
Sven Sandberg's avatar
Sven Sandberg committed
1661
select a, (select max(b) from t1) into outfile "../../tmp/subselect.out.file.1" from t1;
1662
delete from t1;
Sven Sandberg's avatar
Sven Sandberg committed
1663
load data infile "../../tmp/subselect.out.file.1" into table t1;
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select * from t1;
a	b
1	0.123
drop table t1;
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unknown committed
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CREATE TABLE `t1` (
`id` int(11) NOT NULL auto_increment,
`id_cns` tinyint(3) unsigned NOT NULL default '0',
`tipo` enum('','UNO','DUE') NOT NULL default '',
`anno_dep` smallint(4) unsigned zerofill NOT NULL default '0000',
`particolare` mediumint(8) unsigned NOT NULL default '0',
`generale` mediumint(8) unsigned NOT NULL default '0',
`bis` tinyint(3) unsigned NOT NULL default '0',
PRIMARY KEY  (`id`),
UNIQUE KEY `idx_cns_gen_anno` (`anno_dep`,`id_cns`,`generale`,`particolare`),
UNIQUE KEY `idx_cns_par_anno` (`id_cns`,`anno_dep`,`tipo`,`particolare`,`bis`)
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);
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INSERT INTO `t1` VALUES (1,16,'UNO',1987,2048,9681,0),(2,50,'UNO',1987,1536,13987,0),(3,16,'UNO',1987,2432,14594,0),(4,16,'UNO',1987,1792,13422,0),(5,16,'UNO',1987,1025,10240,0),(6,16,'UNO',1987,1026,7089,0);
CREATE TABLE `t2` (
`id` tinyint(3) unsigned NOT NULL auto_increment,
`max_anno_dep` smallint(6) unsigned NOT NULL default '0',
PRIMARY KEY  (`id`)
);
INSERT INTO `t2` VALUES (16,1987),(50,1990),(51,1990);
SELECT cns.id, cns.max_anno_dep, cns.max_anno_dep = (SELECT s.anno_dep FROM t1 AS s WHERE s.id_cns = cns.id ORDER BY s.anno_dep DESC LIMIT 1) AS PIPPO FROM t2 AS cns;
id	max_anno_dep	PIPPO
16	1987	1
50	1990	0
51	1990	NULL
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1692
DROP TABLE t1, t2;
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create table t1 (a int);
insert into t1 values (1), (2), (3);
SET SQL_SELECT_LIMIT=1;
select sum(a) from (select * from t1) as a;
sum(a)
6
select 2 in (select * from t1);
2 in (select * from t1)
1
SET SQL_SELECT_LIMIT=default;
drop table t1;
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CREATE TABLE t1 (a int, b int, INDEX (a));
INSERT INTO t1 VALUES (1, 1), (1, 2), (1, 3);
SELECT * FROM t1 WHERE a = (SELECT MAX(a) FROM t1 WHERE a = 1) ORDER BY b;
a	b
1	1
1	2
1	3
DROP TABLE t1;
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create table t1(val varchar(10));
insert into t1 values ('aaa'), ('bbb'),('eee'),('mmm'),('ppp');
select count(*) from t1 as w1 where w1.val in (select w2.val from t1 as w2 where w2.val like 'm%') and w1.val in (select w3.val from t1 as w3 where w3.val like 'e%');
count(*)
0
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1717
drop table t1;
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create table t1 (id int not null, text varchar(20) not null default '', primary key (id));
insert into t1 (id, text) values (1, 'text1'), (2, 'text2'), (3, 'text3'), (4, 'text4'), (5, 'text5'), (6, 'text6'), (7, 'text7'), (8, 'text8'), (9, 'text9'), (10, 'text10'), (11, 'text11'), (12, 'text12');
select * from t1 where id not in (select id from t1 where id < 8);
id	text
8	text8
9	text9
10	text10
11	text11
12	text12
select * from t1 as tt where not exists (select id from t1 where id < 8 and (id = tt.id or id is null) having id is not null);
id	text
8	text8
9	text9
10	text10
11	text11
12	text12
explain extended select * from t1 where id not in (select id from t1 where id < 8);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	12	100.00	Using where
2	DEPENDENT SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index; Using where
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Warnings:
1739
Note	1003	select `test`.`t1`.`id` AS `id`,`test`.`t1`.`text` AS `text` from `test`.`t1` where (not(<in_optimizer>(`test`.`t1`.`id`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`id`) in t1 on PRIMARY where ((`test`.`t1`.`id` < 8) and (<cache>(`test`.`t1`.`id`) = `test`.`t1`.`id`)))))))
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explain extended select * from t1 as tt where not exists (select id from t1 where id < 8 and (id = tt.id or id is null) having id is not null);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	tt	ALL	NULL	NULL	NULL	NULL	12	100.00	Using where
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2	DEPENDENT SUBQUERY	t1	eq_ref	PRIMARY	PRIMARY	4	test.tt.id	1	100.00	Using where; Using index
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Warnings:
1745
Note	1276	Field or reference 'test.tt.id' of SELECT #2 was resolved in SELECT #1
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Note	1003	select `test`.`tt`.`id` AS `id`,`test`.`tt`.`text` AS `text` from `test`.`t1` `tt` where (not(exists(select `test`.`t1`.`id` from `test`.`t1` where ((`test`.`t1`.`id` < 8) and (`test`.`t1`.`id` = `test`.`tt`.`id`)) having (`test`.`t1`.`id` is not null))))
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insert into t1 (id, text) values (1000, 'text1000'), (1001, 'text1001');
create table t2 (id int not null, text varchar(20) not null default '', primary key (id));
insert into t2 (id, text) values (1, 'text1'), (2, 'text2'), (3, 'text3'), (4, 'text4'), (5, 'text5'), (6, 'text6'), (7, 'text7'), (8, 'text8'), (9, 'text9'), (10, 'text10'), (11, 'text1'), (12, 'text2'), (13, 'text3'), (14, 'text4'), (15, 'text5'), (16, 'text6'), (17, 'text7'), (18, 'text8'), (19, 'text9'), (20, 'text10'),(21, 'text1'), (22, 'text2'), (23, 'text3'), (24, 'text4'), (25, 'text5'), (26, 'text6'), (27, 'text7'), (28, 'text8'), (29, 'text9'), (30, 'text10'), (31, 'text1'), (32, 'text2'), (33, 'text3'), (34, 'text4'), (35, 'text5'), (36, 'text6'), (37, 'text7'), (38, 'text8'), (39, 'text9'), (40, 'text10'), (41, 'text1'), (42, 'text2'), (43, 'text3'), (44, 'text4'), (45, 'text5'), (46, 'text6'), (47, 'text7'), (48, 'text8'), (49, 'text9'), (50, 'text10');
select * from t1 a left join t2 b on (a.id=b.id or b.id is null) join t1 c on (if(isnull(b.id), 1000, b.id)=c.id);
id	text	id	text	id	text
1	text1	1	text1	1	text1
2	text2	2	text2	2	text2
3	text3	3	text3	3	text3
4	text4	4	text4	4	text4
5	text5	5	text5	5	text5
6	text6	6	text6	6	text6
7	text7	7	text7	7	text7
8	text8	8	text8	8	text8
9	text9	9	text9	9	text9
10	text10	10	text10	10	text10
11	text11	11	text1	11	text11
12	text12	12	text2	12	text12
1000	text1000	NULL	NULL	1000	text1000
1001	text1001	NULL	NULL	1000	text1000
explain extended select * from t1 a left join t2 b on (a.id=b.id or b.id is null) join t1 c on (if(isnull(b.id), 1000, b.id)=c.id);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	a	ALL	NULL	NULL	NULL	NULL	14	100.00	
1	SIMPLE	b	eq_ref	PRIMARY	PRIMARY	4	test.a.id	2	100.00	
1	SIMPLE	c	eq_ref	PRIMARY	PRIMARY	4	func	1	100.00	Using where
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Warnings:
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1772
Note	1003	select `test`.`a`.`id` AS `id`,`test`.`a`.`text` AS `text`,`test`.`b`.`id` AS `id`,`test`.`b`.`text` AS `text`,`test`.`c`.`id` AS `id`,`test`.`c`.`text` AS `text` from `test`.`t1` `a` left join `test`.`t2` `b` on(((`test`.`b`.`id` = `test`.`a`.`id`) or isnull(`test`.`b`.`id`))) join `test`.`t1` `c` where (if(isnull(`test`.`b`.`id`),1000,`test`.`b`.`id`) = `test`.`c`.`id`)
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drop table t1,t2;
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create table t1 (a int);
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insert into t1 values (1);
explain select benchmark(1000, (select a from t1 where a=sha(rand())));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	1	
drop table t1;
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create table t1(id int);
create table t2(id int);
create table t3(flag int);
select (select * from t3 where id not null) from t1, t2;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'null) from t1, t2' at line 1
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drop table t1,t2,t3;
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CREATE TABLE t1 (id INT);
CREATE TABLE t2 (id INT);
INSERT INTO t1 VALUES (1), (2);
INSERT INTO t2 VALUES (1);
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SELECT t1.id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id);
id	c
1	1
2	0
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SELECT id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id);
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id	c
1	1
2	0
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SELECT t1.id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id) ORDER BY t1.id;
id	c
1	1
2	0
unknown's avatar
unknown committed
1803
SELECT id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id) ORDER BY id;
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id	c
1	1
2	0
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DROP TABLE t1,t2;
CREATE TABLE t1 ( a int, b int );
INSERT INTO t1 VALUES (1,1),(2,2),(3,3);
SELECT a FROM t1 WHERE a > ANY ( SELECT a FROM t1 WHERE b = 2 );
a
3
SELECT a FROM t1 WHERE a < ANY ( SELECT a FROM t1 WHERE b = 2 );
a
1
SELECT a FROM t1 WHERE a = ANY ( SELECT a FROM t1 WHERE b = 2 );
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2
SELECT a FROM t1 WHERE a >= ANY ( SELECT a FROM t1 WHERE b = 2 );
a
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SELECT a FROM t1 WHERE a <= ANY ( SELECT a FROM t1 WHERE b = 2 );
a
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2
SELECT a FROM t1 WHERE a <> ANY ( SELECT a FROM t1 WHERE b = 2 );
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3
SELECT a FROM t1 WHERE a > ALL ( SELECT a FROM t1 WHERE b = 2 );
a
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SELECT a FROM t1 WHERE a < ALL ( SELECT a FROM t1 WHERE b = 2 );
a
1
SELECT a FROM t1 WHERE a = ALL ( SELECT a FROM t1 WHERE b = 2 );
a
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SELECT a FROM t1 WHERE a >= ALL ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a <= ALL ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a <> ALL ( SELECT a FROM t1 WHERE b = 2 );
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ALTER TABLE t1 ADD INDEX (a);
SELECT a FROM t1 WHERE a > ANY ( SELECT a FROM t1 WHERE b = 2 );
a
3
SELECT a FROM t1 WHERE a < ANY ( SELECT a FROM t1 WHERE b = 2 );
a
1
SELECT a FROM t1 WHERE a = ANY ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a >= ANY ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a <= ANY ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a <> ANY ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a > ALL ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a < ALL ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a = ALL ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a >= ALL ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a <= ALL ( SELECT a FROM t1 WHERE b = 2 );
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SELECT a FROM t1 WHERE a <> ALL ( SELECT a FROM t1 WHERE b = 2 );
a
1
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SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 HAVING a = 2);
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SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 HAVING a = 2);
a
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3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 HAVING a = 2);
a
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2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 HAVING a = 2);
a
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3
SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 HAVING a = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
2
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SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
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SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
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2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
3
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
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SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
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2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
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SELECT a FROM t1 WHERE (1,2) > ANY (SELECT a FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE a > ANY (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) > ANY (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) > ALL (SELECT a FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE a > ALL (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) > ALL (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) = ALL (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) <> ANY (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) = ANY (SELECT a FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 2 column(s)
SELECT a FROM t1 WHERE a = ANY (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) = ANY (SELECT a,2 FROM t1 WHERE b = 2);
a
SELECT a FROM t1 WHERE (1,2) <> ALL (SELECT a FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 2 column(s)
SELECT a FROM t1 WHERE a <> ALL (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) <> ALL (SELECT a,2 FROM t1 WHERE b = 2);
a
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SELECT a FROM t1 WHERE (a,1) = ANY (SELECT a,1 FROM t1 WHERE b = 2);
a
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SELECT a FROM t1 WHERE (a,1) <> ALL (SELECT a,1 FROM t1 WHERE b = 2);
a
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SELECT a FROM t1 WHERE (a,1) = ANY (SELECT a,1 FROM t1 HAVING a = 2);
a
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SELECT a FROM t1 WHERE (a,1) <> ALL (SELECT a,1 FROM t1 HAVING a = 2);
a
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SELECT a FROM t1 WHERE (a,1) = ANY (SELECT a,1 FROM t1 WHERE b = 2 UNION SELECT a,1 FROM t1 WHERE b = 2);
a
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SELECT a FROM t1 WHERE (a,1) <> ALL (SELECT a,1 FROM t1 WHERE b = 2 UNION SELECT a,1 FROM t1 WHERE b = 2);
a
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3
SELECT a FROM t1 WHERE (a,1) = ANY (SELECT a,1 FROM t1 HAVING a = 2 UNION SELECT a,1 FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE (a,1) <> ALL (SELECT a,1 FROM t1 HAVING a = 2 UNION SELECT a,1 FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
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3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
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2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
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SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
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SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
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SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
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SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
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2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
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SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
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SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
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SELECT concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a > t1.a), '-') from t1 a;
concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a > t1.a), '-')
0-
0-
1-
SELECT concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a < t1.a), '-') from t1 a;
concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a < t1.a), '-')
1-
0-
0-
SELECT concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a = t1.a), '-') from t1 a;
concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a = t1.a), '-')
0-
1-
0-
DROP TABLE t1;
CREATE TABLE t1 ( a double, b double );
INSERT INTO t1 VALUES (1,1),(2,2),(3,3);
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 WHERE b = 2e0);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 WHERE b = 2e0);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 WHERE b = 2e0);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 WHERE b = 2e0);
a
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3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 WHERE b = 2e0);
a
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2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 WHERE b = 2e0);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 WHERE b = 2e0);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 WHERE b = 2e0);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 WHERE b = 2e0);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 WHERE b = 2e0);
a
2
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SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 WHERE b = 2e0);
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 WHERE b = 2e0);
a
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3
DROP TABLE t1;
CREATE TABLE t1 ( a char(1), b char(1));
INSERT INTO t1 VALUES ('1','1'),('2','2'),('3','3');
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 WHERE b = '2');
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 WHERE b = '2');
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 WHERE b = '2');
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 WHERE b = '2');
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 WHERE b = '2');
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 WHERE b = '2');
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 WHERE b = '2');
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 WHERE b = '2');
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 WHERE b = '2');
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 WHERE b = '2');
a
2
3
SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 WHERE b = '2');
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 WHERE b = '2');
a
1
3
2269
DROP TABLE t1;
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create table t1 (a int, b int);
insert into t1 values (1,2),(3,4);
select * from t1 up where exists (select * from t1 where t1.a=up.a);
a	b
1	2
3	4
explain extended select * from t1 up where exists (select * from t1 where t1.a=up.a);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	up	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
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2280
Warnings:
2281
Note	1276	Field or reference 'test.up.a' of SELECT #2 was resolved in SELECT #1
2282
Note	1003	select `test`.`up`.`a` AS `a`,`test`.`up`.`b` AS `b` from `test`.`t1` `up` where exists(select 1 from `test`.`t1` where (`test`.`t1`.`a` = `test`.`up`.`a`))
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drop table t1;
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CREATE TABLE t1 (t1_a int);
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (t2_a int, t2_b int, PRIMARY KEY (t2_a, t2_b));
INSERT INTO t2 VALUES (1, 1), (1, 2);
SELECT * FROM t1, t2 table2 WHERE t1_a = 1 AND table2.t2_a = 1
HAVING table2.t2_b = (SELECT MAX(t2_b) FROM t2 WHERE t2_a = table2.t2_a);
t1_a	t2_a	t2_b
1	1	2
DROP TABLE t1, t2;
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CREATE TABLE t1 (id int(11) default NULL,name varchar(10) default NULL);
INSERT INTO t1 VALUES (1,'Tim'),(2,'Rebecca'),(3,NULL);
CREATE TABLE t2 (id int(11) default NULL, pet varchar(10) default NULL);
INSERT INTO t2 VALUES (1,'Fido'),(2,'Spot'),(3,'Felix');
SELECT a.*, b.* FROM (SELECT * FROM t1) AS a JOIN t2 as b on a.id=b.id;
id	name	id	pet
1	Tim	1	Fido
2	Rebecca	2	Spot
3	NULL	3	Felix
drop table t1,t2;
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CREATE TABLE t1 ( a int, b int );
CREATE TABLE t2 ( c int, d int );
INSERT INTO t1 VALUES (1,2), (2,3), (3,4);
2306
SELECT a AS abc, b FROM t1 outr WHERE b =
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(SELECT MIN(b) FROM t1 WHERE a=outr.a);
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abc	b
1	2
2	3
3	4
2312
INSERT INTO t2 SELECT a AS abc, b FROM t1 outr WHERE b =
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(SELECT MIN(b) FROM t1 WHERE a=outr.a);
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select * from t2;
c	d
1	2
2	3
3	4
2319
CREATE TABLE t3 SELECT a AS abc, b FROM t1 outr WHERE b =
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(SELECT MIN(b) FROM t1 WHERE a=outr.a);
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select * from t3;
abc	b
1	2
2	3
3	4
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2326
prepare stmt1 from "INSERT INTO t2 SELECT a AS abc, b FROM t1 outr WHERE b = (SELECT MIN(b) FROM t1 WHERE a=outr.a);";
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execute stmt1;
deallocate prepare stmt1;
select * from t2;
c	d
1	2
2	3
3	4
1	2
2	3
3	4
drop table t3;
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prepare stmt1 from "CREATE TABLE t3 SELECT a AS abc, b FROM t1 outr WHERE b = (SELECT MIN(b) FROM t1 WHERE a=outr.a);";
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execute stmt1;
select * from t3;
abc	b
1	2
2	3
3	4
deallocate prepare stmt1;
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DROP TABLE t1, t2, t3;
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CREATE TABLE `t1` ( `a` int(11) default NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1;
insert into t1 values (1);
CREATE TABLE `t2` ( `b` int(11) default NULL, `a` int(11) default NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1;
insert into t2 values (1,2);
select t000.a, count(*) `C` FROM t1 t000 GROUP BY t000.a HAVING count(*) > ALL (SELECT count(*) FROM t2 t001 WHERE t001.a=1);
a	C
1	1
drop table t1,t2;
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create table t1 (a int not null auto_increment primary key, b varchar(40), fulltext(b));
insert into t1 (b) values ('ball'),('ball games'), ('games'), ('foo'), ('foobar'), ('Serg'), ('Sergei'),('Georg'), ('Patrik'),('Hakan');
create table t2 (a int);
insert into t2 values (1),(3),(2),(7);
select a,b from t1 where match(b) against ('Ball') > 0;
a	b
1	ball
2	ball games
select a from t2 where a in (select a from t1 where match(b) against ('Ball') > 0);
a
1
2
drop table t1,t2;
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CREATE TABLE t1(`IZAVORGANG_ID` VARCHAR(11) CHARACTER SET latin1 COLLATE latin1_bin,`KUERZEL` VARCHAR(10) CHARACTER SET latin1 COLLATE latin1_bin,`IZAANALYSEART_ID` VARCHAR(11) CHARACTER SET latin1 COLLATE latin1_bin,`IZAPMKZ_ID` VARCHAR(11) CHARACTER SET latin1 COLLATE latin1_bin);
CREATE INDEX AK01IZAVORGANG ON t1(izaAnalyseart_id,Kuerzel);
INSERT INTO t1(`IZAVORGANG_ID`,`KUERZEL`,`IZAANALYSEART_ID`,`IZAPMKZ_ID`)VALUES('D0000000001','601','D0000000001','I0000000001');
INSERT INTO t1(`IZAVORGANG_ID`,`KUERZEL`,`IZAANALYSEART_ID`,`IZAPMKZ_ID`)VALUES('D0000000002','602','D0000000001','I0000000001');
INSERT INTO t1(`IZAVORGANG_ID`,`KUERZEL`,`IZAANALYSEART_ID`,`IZAPMKZ_ID`)VALUES('D0000000003','603','D0000000001','I0000000001');
INSERT INTO t1(`IZAVORGANG_ID`,`KUERZEL`,`IZAANALYSEART_ID`,`IZAPMKZ_ID`)VALUES('D0000000004','101','D0000000001','I0000000001');
SELECT `IZAVORGANG_ID` FROM t1 WHERE `KUERZEL` IN(SELECT MIN(`KUERZEL`)`Feld1` FROM t1 WHERE `KUERZEL` LIKE'601%'And`IZAANALYSEART_ID`='D0000000001');
IZAVORGANG_ID
D0000000001
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drop table t1;
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CREATE TABLE `t1` ( `aid` int(11) NOT NULL default '0', `bid` int(11) NOT NULL default '0', PRIMARY KEY  (`aid`,`bid`));
CREATE TABLE `t2` ( `aid` int(11) NOT NULL default '0', `bid` int(11) NOT NULL default '0', PRIMARY KEY  (`aid`,`bid`));
insert into t1 values (1,1),(1,2),(2,1),(2,2);
insert into t2 values (1,2),(2,2);
select * from t1 where t1.aid not in (select aid from t2 where bid=t1.bid);
aid	bid
1	1
2	1
alter table t2 drop primary key;
alter table t2 add key KEY1 (aid, bid);
select * from t1 where t1.aid not in (select aid from t2 where bid=t1.bid);
aid	bid
1	1
2	1
alter table t2 drop key KEY1;
alter table t2 add primary key (bid, aid);
select * from t1 where t1.aid not in (select aid from t2 where bid=t1.bid);
aid	bid
1	1
2	1
drop table t1,t2;
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CREATE TABLE t1 (howmanyvalues bigint, avalue int);
INSERT INTO t1 VALUES (1, 1),(2, 1),(2, 2),(3, 1),(3, 2),(3, 3),(4, 1),(4, 2),(4, 3),(4, 4);
SELECT howmanyvalues, count(*) from t1 group by howmanyvalues;
howmanyvalues	count(*)
1	1
2	2
3	3
4	4
SELECT a.howmanyvalues, (SELECT count(*) from t1 b where b.howmanyvalues = a.howmanyvalues) as mycount from t1 a group by a.howmanyvalues;
howmanyvalues	mycount
1	1
2	2
3	3
4	4
CREATE INDEX t1_howmanyvalues_idx ON t1 (howmanyvalues);
SELECT a.howmanyvalues, (SELECT count(*) from t1 b where b.howmanyvalues+1 = a.howmanyvalues+1) as mycount from t1 a group by a.howmanyvalues;
howmanyvalues	mycount
1	1
2	2
3	3
4	4
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SELECT a.howmanyvalues, (SELECT count(*) from t1 b where b.howmanyvalues = a.howmanyvalues) as mycount from t1 a group by a.howmanyvalues;
howmanyvalues	mycount
1	1
2	2
3	3
4	4
SELECT a.howmanyvalues, (SELECT count(*) from t1 b where b.howmanyvalues = a.avalue) as mycount from t1 a group by a.howmanyvalues;
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howmanyvalues	mycount
1	1
2	1
3	1
4	1
drop table t1;
create table t1 (x int);
select  (select b.x from t1 as b where b.x=a.x) from t1 as a where a.x=2 group by a.x;
(select b.x from t1 as b where b.x=a.x)
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drop table t1;
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CREATE TABLE `t1` ( `master` int(10) unsigned NOT NULL default '0', `map` smallint(6) unsigned NOT NULL default '0', `slave` int(10) unsigned NOT NULL default '0', `access` int(10) unsigned NOT NULL default '0', UNIQUE KEY `access_u` (`master`,`map`,`slave`));
INSERT INTO `t1` VALUES (1,0,0,700),(1,1,1,400),(1,5,5,400),(1,12,12,400),(1,12,32,400),(4,12,32,400);
CREATE TABLE `t2` ( `id` int(10) unsigned NOT NULL default '0', `pid` int(10) unsigned NOT NULL default '0', `map` smallint(6) unsigned NOT NULL default '0', `level` tinyint(4) unsigned NOT NULL default '0', `title` varchar(255) default NULL, PRIMARY KEY  (`id`,`pid`,`map`), KEY `level` (`level`), KEY `id` (`id`,`map`)) ;
INSERT INTO `t2` VALUES (6,5,12,7,'a'),(12,0,0,7,'a'),(12,1,0,7,'a'),(12,5,5,7,'a'),(12,5,12,7,'a');
SELECT b.sc FROM (SELECT (SELECT a.access FROM t1 a WHERE a.map = op.map AND a.slave = op.pid AND a.master = 1) ac FROM t2 op WHERE op.id = 12 AND op.map = 0) b;
ERROR 42S22: Unknown column 'b.sc' in 'field list'
SELECT b.ac FROM (SELECT (SELECT a.access FROM t1 a WHERE a.map = op.map AND a.slave = op.pid AND a.master = 1) ac FROM t2 op WHERE op.id = 12 AND op.map = 0) b;
ac
700
NULL
drop tables t1,t2;
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create table t1 (a int not null, b int not null, c int, primary key (a,b));
insert into t1 values (1,1,1), (2,2,2), (3,3,3);
set @b:= 0;
explain select sum(a) from t1 where b > @b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	8	NULL	3	Using where; Using index
set @a:= (select sum(a) from t1 where b > @b);
explain select a from t1 where c=2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
do @a:= (select sum(a) from t1 where b > @b);
explain select a from t1 where c=2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
drop table t1;
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set @got_val= (SELECT 1 FROM (SELECT 'A' as my_col) as T1 ) ;
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create table t1 (a int, b int);
create table t2 (a int, b int);
insert into t1 values (1,1),(1,2),(1,3),(2,4),(2,5);
insert into t2 values (1,3),(2,1);
select distinct a,b, (select max(b) from t2 where t1.b=t2.a) from t1 order by t1.b;
a	b	(select max(b) from t2 where t1.b=t2.a)
1	1	3
1	2	1
1	3	NULL
2	4	NULL
2	5	NULL
drop table t1, t2;
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create table t1 (id int);
create table t2 (id int, body text, fulltext (body));
insert into t1 values(1),(2),(3);
insert into t2 values (1,'test'), (2,'mysql'), (3,'test'), (4,'test');
select count(distinct id) from t1 where id in (select id from t2 where match(body) against ('mysql' in boolean mode));
count(distinct id)
1
drop table t2,t1;
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create table t1 (s1 int,s2 int);
insert into t1 values (20,15);
select * from t1 where  (('a',null) <=> (select 'a',s2 from t1 where s1 = 0));
s1	s2
drop table t1;
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create table t1 (s1 int);
insert into t1 values (1),(null);
select * from t1 where s1 < all (select s1 from t1);
s1
select s1, s1 < all (select s1 from t1) from t1;
s1	s1 < all (select s1 from t1)
1	0
NULL	NULL
drop table t1;
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CREATE TABLE t1 (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
Continent enum('Asia','Europe','North America','Africa','Oceania','Antarctica','South America') NOT NULL default 'Asia',
Region char(26) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
IndepYear smallint(6) default NULL,
Population int(11) NOT NULL default '0',
LifeExpectancy float(3,1) default NULL,
GNP float(10,2) default NULL,
GNPOld float(10,2) default NULL,
LocalName char(45) NOT NULL default '',
GovernmentForm char(45) NOT NULL default '',
HeadOfState char(60) default NULL,
Capital int(11) default NULL,
Code2 char(2) NOT NULL default ''
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) ENGINE=MyISAM;
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INSERT INTO t1 VALUES ('XXX','Xxxxx','Oceania','Xxxxxx',26.00,0,0,0,0,0,'Xxxxx','Xxxxx','Xxxxx',NULL,'XX');
INSERT INTO t1 VALUES ('ASM','American Samoa','Oceania','Polynesia',199.00,0,68000,75.1,334.00,NULL,'Amerika Samoa','US Territory','George W. Bush',54,'AS');
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INSERT INTO t1 VALUES ('ATF','French Southern territories','Antarctica','Antarctica',7780.00,0,0,NULL,0.00,NULL,'Terres australes françaises','Nonmetropolitan Territory of France','Jacques Chirac',NULL,'TF');
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INSERT INTO t1 VALUES ('UMI','United States Minor Outlying Islands','Oceania','Micronesia/Caribbean',16.00,0,0,NULL,0.00,NULL,'United States Minor Outlying Islands','Dependent Territory of the US','George W. Bush',NULL,'UM');
/*!40000 ALTER TABLE t1 ENABLE KEYS */;
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SELECT DISTINCT Continent AS c FROM t1 outr WHERE
Code <> SOME ( SELECT Code FROM t1 WHERE Continent = outr.Continent AND
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Population < 200);
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c
Oceania
drop table t1;
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create table t1 (a1 int);
create table t2 (b1 int);
select * from t1 where a2 > any(select b1 from t2);
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ERROR 42S22: Unknown column 'a2' in 'IN/ALL/ANY subquery'
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select * from t1 where a1 > any(select b1 from t2);
a1
drop table t1,t2;
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create table t1 (a integer, b integer);
select (select * from t1) = (select 1,2);
(select * from t1) = (select 1,2)
NULL
select (select 1,2) = (select * from t1);
(select 1,2) = (select * from t1)
NULL
select  row(1,2) = ANY (select * from t1);
row(1,2) = ANY (select * from t1)
0
select  row(1,2) != ALL (select * from t1);
row(1,2) != ALL (select * from t1)
1
drop table t1;
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create table t1 (a integer, b integer);
select row(1,(2,2)) in (select * from t1 );
ERROR 21000: Operand should contain 2 column(s)
select row(1,(2,2)) = (select * from t1 );
ERROR 21000: Operand should contain 2 column(s)
select (select * from t1) = row(1,(2,2));
ERROR 21000: Operand should contain 1 column(s)
drop table t1;
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create  table t1 (a integer);
insert into t1 values (1);
select 1 = ALL (select 1 from t1 where 1 = xx ), 1 as xx ;
ERROR 42S22: Reference 'xx' not supported (forward reference in item list)
select 1 = ALL (select 1 from t1 where 1 = xx ), 1 as xx;
ERROR 42S22: Reference 'xx' not supported (forward reference in item list)
select 1 as xx, 1 = ALL (  select 1 from t1 where 1 = xx );
xx	1 = ALL (  select 1 from t1 where 1 = xx )
1	1
select 1 = ALL (select 1 from t1 where 1 = xx ), 1 as xx;
ERROR 42S22: Reference 'xx' not supported (forward reference in item list)
select 1 = ALL (select 1 from t1 where 1 = xx ), 1 as xx from DUAL;
ERROR 42S22: Reference 'xx' not supported (forward reference in item list)
drop table t1;
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CREATE TABLE t1 (
categoryId int(11) NOT NULL,
courseId int(11) NOT NULL,
startDate datetime NOT NULL,
endDate datetime NOT NULL,
createDate datetime NOT NULL,
modifyDate timestamp NOT NULL,
attributes text NOT NULL
);
INSERT INTO t1 VALUES (1,41,'2004-02-09','2010-01-01','2004-02-09','2004-02-09',''),
(1,86,'2004-08-16','2004-08-16','2004-08-16','2004-08-16',''),
(1,87,'2004-08-16','2004-08-16','2004-08-16','2004-08-16',''),
(2,52,'2004-03-15','2004-10-01','2004-03-15','2004-09-17',''),
(2,53,'2004-03-16','2004-10-01','2004-03-16','2004-09-17',''),
(2,88,'2004-08-16','2004-08-16','2004-08-16','2004-08-16',''),
(2,89,'2004-08-16','2004-08-16','2004-08-16','2004-08-16',''),
(3,51,'2004-02-09','2010-01-01','2004-02-09','2004-02-09',''),
(5,12,'2004-02-18','2010-01-01','2004-02-18','2004-02-18','');
CREATE TABLE t2 (
userId int(11) NOT NULL,
courseId int(11) NOT NULL,
date datetime NOT NULL
);
INSERT INTO t2 VALUES (5141,71,'2003-11-18'),
(5141,72,'2003-11-25'),(5141,41,'2004-08-06'),
(5141,52,'2004-08-06'),(5141,53,'2004-08-06'),
(5141,12,'2004-08-06'),(5141,86,'2004-10-21'),
(5141,87,'2004-10-21'),(5141,88,'2004-10-21'),
(5141,89,'2004-10-22'),(5141,51,'2004-10-26');
CREATE TABLE t3 (
groupId int(11) NOT NULL,
parentId int(11) NOT NULL,
startDate datetime NOT NULL,
endDate datetime NOT NULL,
createDate datetime NOT NULL,
modifyDate timestamp NOT NULL,
ordering int(11)
);
INSERT INTO t3 VALUES (12,9,'1000-01-01','3999-12-31','2004-01-29','2004-01-29',NULL);
CREATE TABLE t4 (
id int(11) NOT NULL,
groupTypeId int(11) NOT NULL,
groupKey varchar(50) NOT NULL,
name text,
ordering int(11),
description text,
createDate datetime NOT NULL,
modifyDate timestamp NOT NULL
);
INSERT INTO t4 VALUES (9,5,'stationer','stationer',0,'Stationer','2004-01-29','2004-01-29'),
(12,5,'group2','group2',0,'group2','2004-01-29','2004-01-29');
CREATE TABLE t5 (
userId int(11) NOT NULL,
groupId int(11) NOT NULL,
createDate datetime NOT NULL,
modifyDate timestamp NOT NULL
);
INSERT INTO t5 VALUES (5141,12,'2004-08-06','2004-08-06');
select
count(distinct t2.userid) pass,
groupstuff.*,
count(t2.courseid) crse,
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t1.categoryid,
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t2.courseid,
date_format(date, '%b%y') as colhead
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from t2
join t1 on t2.courseid=t1.courseid
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join
(
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select
t5.userid,
parentid,
parentgroup,
childid,
groupname,
grouptypeid
from t5
join
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(
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select t4.id as parentid,
t4.name as parentgroup,
t4.id as childid,
t4.name as groupname,
t4.grouptypeid
from t4
) as gin on t5.groupid=gin.childid
) as groupstuff on t2.userid = groupstuff.userid
group by
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groupstuff.groupname, colhead , t2.courseid;
pass	userid	parentid	parentgroup	childid	groupname	grouptypeid	crse	categoryid	courseid	colhead
1	5141	12	group2	12	group2	5	1	5	12	Aug04
1	5141	12	group2	12	group2	5	1	1	41	Aug04
1	5141	12	group2	12	group2	5	1	2	52	Aug04
1	5141	12	group2	12	group2	5	1	2	53	Aug04
1	5141	12	group2	12	group2	5	1	3	51	Oct04
1	5141	12	group2	12	group2	5	1	1	86	Oct04
1	5141	12	group2	12	group2	5	1	1	87	Oct04
1	5141	12	group2	12	group2	5	1	2	88	Oct04
1	5141	12	group2	12	group2	5	1	2	89	Oct04
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drop table t1, t2, t3, t4, t5;
create table t1 (a int);
insert into t1 values (1), (2), (3);
SELECT 1 FROM t1 WHERE (SELECT 1) in (SELECT 1);
1
1
1
1
drop table t1;
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create table t1 (a int);
create table t2 (a int);
insert into t1 values (1),(2);
insert into t2 values (0),(1),(2),(3);
select a from t2 where a in (select a from t1);
a
1
2
select a from t2 having a in (select a from t1);
a
1
2
prepare stmt1 from "select a from t2 where a in (select a from t1)";
execute stmt1;
a
1
2
execute stmt1;
a
1
2
deallocate prepare stmt1;
prepare stmt1 from "select a from t2 having a in (select a from t1)";
execute stmt1;
a
1
2
execute stmt1;
a
1
2
deallocate prepare stmt1;
drop table t1, t2;
create table t1 (a int, b int);
insert into t1 values (1,2);
select 1 = (select * from t1);
ERROR 21000: Operand should contain 1 column(s)
select (select * from t1) = 1;
ERROR 21000: Operand should contain 2 column(s)
select (1,2) = (select a from t1);
ERROR 21000: Operand should contain 2 column(s)
select (select a from t1) = (1,2);
ERROR 21000: Operand should contain 1 column(s)
select (1,2,3) = (select * from t1);
ERROR 21000: Operand should contain 3 column(s)
select (select * from t1) = (1,2,3);
ERROR 21000: Operand should contain 2 column(s)
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drop table t1;
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CREATE TABLE `t1` (
`itemid` bigint(20) unsigned NOT NULL auto_increment,
`sessionid` bigint(20) unsigned default NULL,
`time` int(10) unsigned NOT NULL default '0',
`type` set('A','D','E','F','G','I','L','N','U') collate latin1_general_ci NOT
NULL default '',
`data` text collate latin1_general_ci NOT NULL,
PRIMARY KEY  (`itemid`)
) DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO `t1` VALUES (1, 1, 1, 'D', '');
CREATE TABLE `t2` (
`sessionid` bigint(20) unsigned NOT NULL auto_increment,
`pid` int(10) unsigned NOT NULL default '0',
`date` int(10) unsigned NOT NULL default '0',
`ip` varchar(15) collate latin1_general_ci NOT NULL default '',
PRIMARY KEY  (`sessionid`)
) DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO `t2` VALUES (1, 1, 1, '10.10.10.1');
SELECT s.ip, count( e.itemid ) FROM `t1` e JOIN t2 s ON s.sessionid = e.sessionid WHERE e.sessionid = ( SELECT sessionid FROM t2 ORDER BY sessionid DESC LIMIT 1 ) GROUP BY s.ip HAVING count( e.itemid ) >0 LIMIT 0 , 30;
ip	count( e.itemid )
10.10.10.1	1
drop tables t1,t2;
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create table t1 (fld enum('0','1'));
insert into t1 values ('1');
select * from (select max(fld) from t1) as foo;
max(fld)
1
drop table t1;
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CREATE TABLE t1 (one int, two int, flag char(1));
CREATE TABLE t2 (one int, two int, flag char(1));
INSERT INTO t1 VALUES(1,2,'Y'),(2,3,'Y'),(3,4,'Y'),(5,6,'N'),(7,8,'N');
INSERT INTO t2 VALUES(1,2,'Y'),(2,3,'Y'),(3,4,'Y'),(5,6,'N'),(7,8,'N');
SELECT * FROM t1
WHERE ROW(one,two) IN (SELECT DISTINCT one,two FROM t2 WHERE flag = 'N');
one	two	flag
5	6	N
7	8	N
SELECT * FROM t1
WHERE ROW(one,two) IN (SELECT DISTINCT one,two FROM t1 WHERE flag = 'N');
one	two	flag
5	6	N
7	8	N
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insert into t2 values (null,null,'N');
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insert into t2 values (null,3,'0');
insert into t2 values (null,5,'0');
insert into t2 values (10,null,'0');
insert into t1 values (10,3,'0');
insert into t1 values (10,5,'0');
insert into t1 values (10,10,'0');
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SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N') as 'test' from t1;
one	two	test
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1	2	NULL
2	3	NULL
3	4	NULL
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5	6	1
7	8	1
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10	3	NULL
10	5	NULL
10	10	NULL
SELECT one,two from t1 where ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N');
one	two
5	6
7	8
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SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N' group by one,two) as 'test' from t1;
one	two	test
1	2	NULL
2	3	NULL
3	4	NULL
5	6	1
7	8	1
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10	3	NULL
10	5	NULL
10	10	NULL
SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0') as 'test' from t1;
one	two	test
1	2	0
2	3	NULL
3	4	0
5	6	0
7	8	0
10	3	NULL
10	5	NULL
10	10	NULL
SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0' group by one,two) as 'test' from t1;
one	two	test
1	2	0
2	3	NULL
3	4	0
5	6	0
7	8	0
10	3	NULL
10	5	NULL
10	10	NULL
explain extended SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0') as 'test' from t1;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	9	100.00	Using where
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Warnings:
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Note	1003	select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where ((`test`.`t2`.`flag` = '0') and trigcond(((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`))) and trigcond(((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`)))) having (trigcond(<is_not_null_test>(`test`.`t2`.`one`)) and trigcond(<is_not_null_test>(`test`.`t2`.`two`))))) AS `test` from `test`.`t1`
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explain extended SELECT one,two from t1 where ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N');
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	9	100.00	Using where
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Warnings:
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Note	1003	select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `test`.`t1` where <in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where ((`test`.`t2`.`flag` = 'N') and (<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) and (<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`))))
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explain extended SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0' group by one,two) as 'test' from t1;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	9	100.00	Using where; Using temporary; Using filesort
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Warnings:
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Note	1003	select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where (`test`.`t2`.`flag` = '0') group by `test`.`t2`.`one`,`test`.`t2`.`two` having (trigcond(((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`))) and trigcond(((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`))) and trigcond(<is_not_null_test>(`test`.`t2`.`one`)) and trigcond(<is_not_null_test>(`test`.`t2`.`two`))))) AS `test` from `test`.`t1`
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DROP TABLE t1,t2;
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CREATE TABLE t1 (a char(5), b char(5));
INSERT INTO t1 VALUES (NULL,'aaa'), ('aaa','aaa');
SELECT * FROM t1 WHERE (a,b) IN (('aaa','aaa'), ('aaa','bbb'));
a	b
aaa	aaa
DROP TABLE t1;
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CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int, b int);
CREATE TABLE t3 (b int NOT NULL);
INSERT INTO t1 VALUES (1), (2), (3), (4);
INSERT INTO t2 VALUES (1,10), (3,30);
SELECT * FROM t2 LEFT JOIN t3 ON t2.b=t3.b
WHERE t3.b IS NOT NULL OR t2.a > 10;
a	b	b
SELECT * FROM t1
WHERE t1.a NOT IN (SELECT a FROM t2 LEFT JOIN t3 ON t2.b=t3.b
WHERE t3.b IS NOT NULL OR t2.a > 10);
a
1
2
3
4
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DROP TABLE t1,t2,t3;
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CREATE TABLE t1 (f1 INT);
CREATE TABLE t2 (f2 INT);
INSERT INTO t1 VALUES (1);
SELECT * FROM t1 WHERE f1 > ALL (SELECT f2 FROM t2);
f1
1
SELECT * FROM t1 WHERE f1 > ALL (SELECT f2 FROM t2 WHERE 1=0);
f1
1
INSERT INTO t2 VALUES (1);
INSERT INTO t2 VALUES (2);
SELECT * FROM t1 WHERE f1 > ALL (SELECT f2 FROM t2 WHERE f2=0);
f1
1
DROP TABLE t1, t2;
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select 1 from dual where 1 < any (select 2);
1
1
select 1 from dual where 1 < all (select 2);
1
1
select 1 from dual where 2 > any (select 1);
1
1
select 1 from dual where 2 > all (select 1);
1
1
select 1 from dual where 1 < any (select 2 from dual);
1
1
select 1 from dual where 1 < all (select 2 from dual where 1!=1);
1
1
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create table t1 (s1 char);
insert into t1 values (1),(2);
select * from t1 where (s1 < any (select s1 from t1));
s1
1
select * from t1 where not (s1 < any (select s1 from t1));
s1
2
select * from t1 where (s1 < ALL (select s1+1 from t1));
s1
1
select * from t1 where not(s1 < ALL (select s1+1 from t1));
s1
2
select * from t1 where (s1+1 = ANY (select s1 from t1));
s1
1
select * from t1 where NOT(s1+1 = ANY (select s1 from t1));
s1
2
select * from t1 where (s1 = ALL (select s1/s1 from t1));
s1
1
select * from t1 where NOT(s1 = ALL (select s1/s1 from t1));
s1
2
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drop table t1;
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create table t1 (
retailerID varchar(8) NOT NULL,
statusID   int(10) unsigned NOT NULL,
changed    datetime NOT NULL,
UNIQUE KEY retailerID (retailerID, statusID, changed)
);
INSERT INTO t1 VALUES("0026", "1", "2005-12-06 12:18:56");
INSERT INTO t1 VALUES("0026", "2", "2006-01-06 12:25:53");
INSERT INTO t1 VALUES("0037", "1", "2005-12-06 12:18:56");
INSERT INTO t1 VALUES("0037", "2", "2006-01-06 12:25:53");
INSERT INTO t1 VALUES("0048", "1", "2006-01-06 12:37:50");
INSERT INTO t1 VALUES("0059", "1", "2006-01-06 12:37:50");
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select * from t1 r1
where (r1.retailerID,(r1.changed)) in
(SELECT r2.retailerId,(max(changed)) from t1 r2
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group by r2.retailerId);
retailerID	statusID	changed
0026	2	2006-01-06 12:25:53
0037	2	2006-01-06 12:25:53
0048	1	2006-01-06 12:37:50
0059	1	2006-01-06 12:37:50
drop table t1;
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create table t1(a int, primary key (a));
insert into t1 values (10);
create table t2 (a int primary key, b varchar(32), c int, unique key b(c, b));
insert into t2(a, c, b) values (1,10,'359'), (2,10,'35988'), (3,10,'35989');
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explain SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r
ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899'
             ORDER BY t2.c DESC, t2.b DESC LIMIT 1) WHERE t1.a = 10;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	PRIMARY	NULL	NULL	NULL	1	
1	PRIMARY	r	const	PRIMARY	PRIMARY	4	const	1	
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2	DEPENDENT SUBQUERY	t2	range	b	b	40	NULL	2	Using where
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SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r
ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899'
            ORDER BY t2.c DESC, t2.b DESC LIMIT 1) WHERE t1.a = 10;
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a	a	b
10	3	35989
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explain SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r
ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899'
            ORDER BY t2.c, t2.b LIMIT 1) WHERE t1.a = 10;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	PRIMARY	NULL	NULL	NULL	1	
1	PRIMARY	r	const	PRIMARY	PRIMARY	4	const	1	
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2	DEPENDENT SUBQUERY	t2	range	b	b	40	NULL	2	Using where
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SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r
ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899'
            ORDER BY t2.c, t2.b LIMIT 1) WHERE t1.a = 10;
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a	a	b
10	1	359
drop table t1,t2;
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CREATE TABLE t1 (
field1 int NOT NULL,
field2 int NOT NULL,
field3 int NOT NULL,
PRIMARY KEY  (field1,field2,field3)
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);
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CREATE TABLE t2 (
fieldA int NOT NULL,
fieldB int NOT NULL,
PRIMARY KEY  (fieldA,fieldB)
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);
INSERT INTO t1 VALUES
(1,1,1), (1,1,2), (1,2,1), (1,2,2), (1,2,3), (1,3,1);
INSERT INTO t2 VALUES (1,1), (1,2), (1,3);
SELECT field1, field2, COUNT(*)
FROM t1 GROUP BY field1, field2;
field1	field2	COUNT(*)
1	1	2
1	2	3
1	3	1
SELECT field1, field2
FROM  t1
GROUP BY field1, field2
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HAVING COUNT(*) >= ALL (SELECT fieldB
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FROM t2 WHERE fieldA = field1);
field1	field2
1	2
SELECT field1, field2
FROM  t1
GROUP BY field1, field2
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HAVING COUNT(*) < ANY (SELECT fieldB
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FROM t2 WHERE fieldA = field1);
field1	field2
1	1
1	3
DROP TABLE t1, t2;
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CREATE TABLE t1(a int, INDEX (a));
INSERT INTO t1 VALUES (1), (3), (5), (7);
INSERT INTO t1 VALUES (NULL);
CREATE TABLE t2(a int);
INSERT INTO t2 VALUES (1),(2),(3);
EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	
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2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	2	Using index; Full scan on NULL key
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SELECT a, a IN (SELECT a FROM t1) FROM t2;
a	a IN (SELECT a FROM t1)
1	1
2	NULL
3	1
DROP TABLE t1,t2;
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CREATE TABLE t1 (a DATETIME);
INSERT INTO t1 VALUES ('1998-09-23'), ('2003-03-25');
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CREATE TABLE t2 AS SELECT
(SELECT a FROM t1 WHERE a < '2000-01-01') AS sub_a
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FROM t1 WHERE a > '2000-01-01';
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
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  `sub_a` datetime DEFAULT NULL
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
CREATE TABLE t3 AS (SELECT a FROM t1 WHERE a < '2000-01-01') UNION (SELECT a FROM t1 WHERE a > '2000-01-01');
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
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  `a` datetime DEFAULT NULL
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1,t2,t3;
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CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) > 0;
a
SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) IS NULL;
a
1
2
EXPLAIN SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
DROP TABLE t1;
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CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (2), (4), (1), (3);
CREATE TABLE t2 (b int, c int);
INSERT INTO t2 VALUES
(2,1), (1,3), (2,1), (4,4), (2,2), (1,4);
SELECT a FROM t1 ORDER BY (SELECT c FROM t2 WHERE b > 2 );
a
2
4
1
3
SELECT a FROM t1 ORDER BY (SELECT c FROM t2 WHERE b > 1);
ERROR 21000: Subquery returns more than 1 row
SELECT a FROM t1 ORDER BY (SELECT c FROM t2 WHERE b > 2), a;
a
1
2
3
4
SELECT a FROM t1 ORDER BY (SELECT c FROM t2 WHERE b > 1), a;
ERROR 21000: Subquery returns more than 1 row
SELECT b, MAX(c) FROM t2 GROUP BY b, (SELECT c FROM t2 WHERE b > 2);
b	MAX(c)
1	4
2	2
4	4
SELECT b, MAX(c) FROM t2 GROUP BY b, (SELECT c FROM t2 WHERE b > 1);
ERROR 21000: Subquery returns more than 1 row
SELECT a FROM t1 GROUP BY a
HAVING IFNULL((SELECT b FROM t2 WHERE b > 2),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3;
a
1
2
3
4
SELECT a FROM t1 GROUP BY a
HAVING IFNULL((SELECT b FROM t2 WHERE b > 1),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3;
ERROR 21000: Subquery returns more than 1 row
SELECT a FROM t1 GROUP BY a
HAVING IFNULL((SELECT b FROM t2 WHERE b > 4),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3;
a
4
SELECT a FROM t1 GROUP BY a
HAVING IFNULL((SELECT b FROM t2 WHERE b > 4),
(SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)) > 3;
ERROR 21000: Subquery returns more than 1 row
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SELECT a FROM t1
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ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b));
a
2
4
1
3
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SELECT a FROM t1
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ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 1),
(SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b));
ERROR 21000: Subquery returns more than 1 row
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SELECT a FROM t1
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ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b));
a
2
1
3
4
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SELECT a FROM t1
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ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4),
(SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b));
ERROR 21000: Subquery returns more than 1 row
DROP TABLE t1,t2;
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create table t1 (df decimal(5,1));
insert into t1 values(1.1);
insert into t1 values(2.2);
select * from t1 where df <= all (select avg(df) from t1 group by df);
df
1.1
select * from t1 where df >= all (select avg(df) from t1 group by df);
df
2.2
drop table t1;
create table t1 (df decimal(5,1));
insert into t1 values(1.1);
select 1.1 * exists(select * from t1);
1.1 * exists(select * from t1)
1.1
drop table t1;
CREATE TABLE t1 (
grp int(11) default NULL,
a decimal(10,2) default NULL);
insert into t1 values (1, 1), (2, 2), (2, 3), (3, 4), (3, 5), (3, 6), (NULL, NULL);
select * from t1;
grp	a
1	1.00
2	2.00
2	3.00
3	4.00
3	5.00
3	6.00
NULL	NULL
select min(a) from t1 group by grp;
min(a)
NULL
1.00
2.00
4.00
drop table t1;
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CREATE table t1 ( c1 integer );
INSERT INTO t1 VALUES ( 1 );
INSERT INTO t1 VALUES ( 2 );
INSERT INTO t1 VALUES ( 3 );
CREATE TABLE t2 ( c2 integer );
INSERT INTO t2 VALUES ( 1 );
INSERT INTO t2 VALUES ( 4 );
INSERT INTO t2 VALUES ( 5 );
SELECT * FROM t1 LEFT JOIN t2 ON c1 = c2 WHERE c2 IN (1);
c1	c2
1	1
SELECT * FROM t1 LEFT JOIN t2 ON c1 = c2
WHERE c2 IN ( SELECT c2 FROM t2 WHERE c2 IN ( 1 ) );
c1	c2
1	1
DROP TABLE t1,t2;
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CREATE TABLE t1 ( c1 integer );
INSERT INTO t1 VALUES ( 1 );
INSERT INTO t1 VALUES ( 2 );
INSERT INTO t1 VALUES ( 3 );
INSERT INTO t1 VALUES ( 6 );
CREATE TABLE t2 ( c2 integer );
INSERT INTO t2 VALUES ( 1 );
INSERT INTO t2 VALUES ( 4 );
INSERT INTO t2 VALUES ( 5 );
INSERT INTO t2 VALUES ( 6 );
CREATE TABLE t3 ( c3 integer );
INSERT INTO t3 VALUES ( 7 );
INSERT INTO t3 VALUES ( 8 );
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SELECT c1,c2 FROM t1 LEFT JOIN t2 ON c1 = c2
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WHERE EXISTS (SELECT c3 FROM t3 WHERE c2 IS NULL );
c1	c2
2	NULL
3	NULL
DROP TABLE t1,t2,t3;
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CREATE TABLE `t1` (
`itemid` bigint(20) unsigned NOT NULL auto_increment,
`sessionid` bigint(20) unsigned default NULL,
`time` int(10) unsigned NOT NULL default '0',
`type` set('A','D','E','F','G','I','L','N','U') collate latin1_general_ci NOT
NULL default '',
`data` text collate latin1_general_ci NOT NULL,
PRIMARY KEY  (`itemid`)
) DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO `t1` VALUES (1, 1, 1, 'D', '');
CREATE TABLE `t2` (
`sessionid` bigint(20) unsigned NOT NULL auto_increment,
`pid` int(10) unsigned NOT NULL default '0',
`date` int(10) unsigned NOT NULL default '0',
`ip` varchar(15) collate latin1_general_ci NOT NULL default '',
PRIMARY KEY  (`sessionid`)
) DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO `t2` VALUES (1, 1, 1, '10.10.10.1');
SELECT s.ip, count( e.itemid ) FROM `t1` e JOIN t2 s ON s.sessionid = e.sessionid WHERE e.sessionid = ( SELECT sessionid FROM t2 ORDER BY sessionid DESC LIMIT 1 ) GROUP BY s.ip HAVING count( e.itemid ) >0 LIMIT 0 , 30;
ip	count( e.itemid )
10.10.10.1	1
drop tables t1,t2;
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CREATE TABLE t1 (EMPNUM   CHAR(3));
CREATE TABLE t2 (EMPNUM   CHAR(3) );
INSERT INTO t1 VALUES ('E1'),('E2');
INSERT INTO t2 VALUES ('E1');
DELETE FROM t1
WHERE t1.EMPNUM NOT IN
(SELECT t2.EMPNUM
FROM t2
WHERE t1.EMPNUM = t2.EMPNUM);
select * from t1;
EMPNUM
E1
DROP TABLE t1,t2;
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CREATE TABLE t1(select_id BIGINT, values_id BIGINT);
INSERT INTO t1 VALUES (1, 1);
3234
CREATE TABLE t2 (select_id BIGINT, values_id BIGINT,
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PRIMARY KEY(select_id,values_id));
INSERT INTO t2 VALUES (0, 1), (0, 2), (0, 3), (1, 5);
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SELECT values_id FROM t1
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WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id IN (1, 0));
values_id
1
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SELECT values_id FROM t1
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WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id BETWEEN 0 AND 1);
values_id
1
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SELECT values_id FROM t1
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WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id = 0 OR select_id = 1);
values_id
1
DROP TABLE t1, t2;
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create table t1 (fld enum('0','1'));
insert into t1 values ('1');
select * from (select max(fld) from t1) as foo;
max(fld)
1
drop table t1;
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CREATE TABLE t1 (a int, b int);
CREATE TABLE t2 (c int, d int);
CREATE TABLE t3 (e int);
3262
INSERT INTO t1 VALUES
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(1,10), (2,10), (1,20), (2,20), (3,20), (2,30), (4,40);
INSERT INTO t2 VALUES
(2,10), (2,20), (4,10), (5,10), (3,20), (2,40);
INSERT INTO t3 VALUES (10), (30), (10), (20) ;
SELECT a, MAX(b), MIN(b) FROM t1 GROUP BY a;
a	MAX(b)	MIN(b)
1	20	10
2	30	10
3	20	20
4	40	40
SELECT * FROM t2;
c	d
2	10
2	20
4	10
5	10
3	20
2	40
SELECT * FROM t3;
e
10
30
10
20
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2 WHERE MAX(b)>20);
a
2
4
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2 WHERE MAX(b)<d);
a
2
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2 WHERE MAX(b)>d);
a
2
4
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
WHERE d >= SOME(SELECT e FROM t3 WHERE MAX(b)=e));
a
2
3
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
WHERE  EXISTS(SELECT e FROM t3 WHERE MAX(b)=e AND e <= d));
a
2
3
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
WHERE d > SOME(SELECT e FROM t3 WHERE MAX(b)=e));
a
2
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
WHERE  EXISTS(SELECT e FROM t3 WHERE MAX(b)=e AND e < d));
a
2
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
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WHERE MIN(b) < d AND
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EXISTS(SELECT e FROM t3 WHERE MAX(b)=e AND e <= d));
a
2
SELECT a, SUM(a) FROM t1 GROUP BY a;
a	SUM(a)
1	2
2	6
3	3
4	4
SELECT a FROM t1
WHERE EXISTS(SELECT c FROM t2 GROUP BY c HAVING SUM(a) = c) GROUP BY a;
a
3
4
SELECT a FROM t1 GROUP BY a
HAVING EXISTS(SELECT c FROM t2 GROUP BY c HAVING SUM(a) = c);
a
1
3
4
SELECT a FROM t1
WHERE a < 3 AND
EXISTS(SELECT c FROM t2 GROUP BY c HAVING SUM(a) != c) GROUP BY a;
a
1
2
SELECT a FROM t1
WHERE a < 3 AND
EXISTS(SELECT c FROM t2 GROUP BY c HAVING SUM(a) != c);
a
1
2
1
2
2
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a < ALL(SELECT t2.c FROM t2 GROUP BY t2.c
HAVING EXISTS(SELECT t3.e FROM t3 GROUP BY t3.e
HAVING SUM(t1.a+t2.c) < t3.e/4));
a
1
2
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a > ALL(SELECT t2.c FROM t2
WHERE EXISTS(SELECT t3.e FROM t3 GROUP BY t3.e
HAVING SUM(t1.a+t2.c) < t3.e/4));
a
4
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a > ALL(SELECT t2.c FROM t2
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WHERE EXISTS(SELECT t3.e FROM t3
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WHERE SUM(t1.a+t2.c) < t3.e/4));
ERROR HY000: Invalid use of group function
SELECT t1.a from t1 GROUP BY t1.a HAVING AVG(SUM(t1.b)) > 20;
ERROR HY000: Invalid use of group function
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a IN (SELECT t2.c FROM t2 GROUP BY t2.c
HAVING AVG(t2.c+SUM(t1.b)) > 20);
a
2
3
4
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a IN (SELECT t2.c FROM t2 GROUP BY t2.c
HAVING AVG(SUM(t1.b)) > 20);
a
2
4
SELECT t1.a, SUM(b) AS sum  FROM t1 GROUP BY t1.a
HAVING t1.a IN (SELECT t2.c FROM t2 GROUP BY t2.c
HAVING t2.c+sum > 20);
a	sum
2	60
3	20
4	40
DROP TABLE t1,t2,t3;
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CREATE TABLE t1 (a varchar(5), b varchar(10));
INSERT INTO t1 VALUES
('AAA', 5), ('BBB', 4), ('BBB', 1), ('CCC', 2),
('CCC', 7), ('AAA', 2), ('AAA', 4), ('BBB', 3), ('AAA', 8);
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
a	b
BBB	4
CCC	7
AAA	8
EXPLAIN
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	9	Using where
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	9	Using temporary; Using filesort
ALTER TABLE t1 ADD INDEX(a);
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
a	b
BBB	4
CCC	7
AAA	8
EXPLAIN
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	9	Using where
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2	DEPENDENT SUBQUERY	t1	index	NULL	a	8	NULL	1	Using filesort
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DROP TABLE t1;
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create table t1( f1 int,f2 int);
insert into t1 values (1,1),(2,2);
select tt.t from (select 'crash1' as t, f2 from t1) as tt left join t1 on tt.t = 'crash2' and tt.f2 = t1.f2 where tt.t = 'crash1';
t
crash1
crash1
drop table t1;
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create table t1 (c int, key(c));
insert into t1 values (1142477582), (1142455969);
create table t2 (a int, b int);
insert into t2 values (2, 1), (1, 0);
delete from t1 where c <= 1140006215 and (select b from t2 where a = 2) = 1;
drop table t1, t2;
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CREATE TABLE t1 (a INT);
CREATE VIEW v1 AS SELECT * FROM t1 WHERE no_such_column = ANY (SELECT 1);
ERROR 42S22: Unknown column 'no_such_column' in 'where clause'
CREATE VIEW v2 AS SELECT * FROM t1 WHERE no_such_column = (SELECT 1);
ERROR 42S22: Unknown column 'no_such_column' in 'where clause'
SELECT * FROM t1 WHERE no_such_column = ANY (SELECT 1);
ERROR 42S22: Unknown column 'no_such_column' in 'IN/ALL/ANY subquery'
DROP TABLE t1;
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create table t1 (i int, j bigint);
insert into t1 values (1, 2), (2, 2), (3, 2);
select * from (select min(i) from t1 where j=(select * from (select min(j) from t1) t2)) t3;
min(i)
1
drop table t1;
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CREATE TABLE t1 (i BIGINT UNSIGNED);
INSERT INTO t1 VALUES (10000000000000000000);
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (i BIGINT UNSIGNED);
INSERT INTO t2 VALUES (10000000000000000000);
INSERT INTO t2 VALUES (1);
/* simple test */
SELECT t1.i FROM t1 JOIN t2 ON t1.i = t2.i;
i
10000000000000000000
1
/* subquery test */
SELECT t1.i FROM t1 WHERE t1.i = (SELECT MAX(i) FROM t2);
i
10000000000000000000
/* subquery test with cast*/
SELECT t1.i FROM t1 WHERE t1.i = CAST((SELECT MAX(i) FROM t2) AS UNSIGNED);
i
10000000000000000000
DROP TABLE t1;
DROP TABLE t2;
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CREATE TABLE t1 (
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id bigint(20) unsigned NOT NULL auto_increment,
name varchar(255) NOT NULL,
PRIMARY KEY  (id)
);
INSERT INTO t1 VALUES
(1, 'Balazs'), (2, 'Joe'), (3, 'Frank');
CREATE TABLE t2 (
id bigint(20) unsigned NOT NULL auto_increment,
mid bigint(20) unsigned NOT NULL,
date date NOT NULL,
PRIMARY KEY  (id)
);
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INSERT INTO t2 VALUES
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(1, 1, '2006-03-30'), (2, 2, '2006-04-06'), (3, 3, '2006-04-13'),
(4, 2, '2006-04-20'), (5, 1, '2006-05-01');
SELECT *,
(SELECT date FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 0, 1) AS date_last,
(SELECT date FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 3, 1) AS date_next_to_last
FROM t1;
id	name	date_last	date_next_to_last
1	Balazs	2006-05-01	NULL
2	Joe	2006-04-20	NULL
3	Frank	2006-04-13	NULL
SELECT *,
(SELECT COUNT(*) FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 1, 1) AS date_count
FROM t1;
id	name	date_count
1	Balazs	NULL
2	Joe	NULL
3	Frank	NULL
SELECT *,
(SELECT date FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 0, 1) AS date_last,
(SELECT date FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 1, 1) AS date_next_to_last
FROM t1;
id	name	date_last	date_next_to_last
1	Balazs	2006-05-01	2006-03-30
2	Joe	2006-04-20	2006-04-06
3	Frank	2006-04-13	NULL
DROP TABLE t1,t2;
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CREATE TABLE t1 (
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i1 int(11) NOT NULL default '0',
i2 int(11) NOT NULL default '0',
t datetime NOT NULL default '0000-00-00 00:00:00',
PRIMARY KEY  (i1,i2,t)
);
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INSERT INTO t1 VALUES
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(24,1,'2005-03-03 16:31:31'),(24,1,'2005-05-27 12:40:07'),
(24,1,'2005-05-27 12:40:08'),(24,1,'2005-05-27 12:40:10'),
(24,1,'2005-05-27 12:40:25'),(24,1,'2005-05-27 12:40:30'),
(24,2,'2005-03-03 13:43:05'),(24,2,'2005-03-03 16:23:31'),
(24,2,'2005-03-03 16:31:30'),(24,2,'2005-05-27 12:37:02'),
(24,2,'2005-05-27 12:40:06');
CREATE TABLE t2 (
i1 int(11) NOT NULL default '0',
i2 int(11) NOT NULL default '0',
t datetime default NULL,
PRIMARY KEY  (i1)
);
INSERT INTO t2 VALUES (24,1,'2006-06-20 12:29:40');
EXPLAIN
SELECT * FROM t1,t2
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WHERE t1.t = (SELECT t1.t FROM t1
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WHERE t1.t < t2.t  AND t1.i2=1 AND t2.i1=t1.i1
ORDER BY t1.t DESC LIMIT 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	t1	index	NULL	PRIMARY	16	NULL	11	Using where; Using index
2	DEPENDENT SUBQUERY	t1	range	PRIMARY	PRIMARY	16	NULL	5	Using where; Using index
SELECT * FROM t1,t2
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WHERE t1.t = (SELECT t1.t FROM t1
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WHERE t1.t < t2.t  AND t1.i2=1 AND t2.i1=t1.i1
ORDER BY t1.t DESC LIMIT 1);
i1	i2	t	i1	i2	t
24	1	2005-05-27 12:40:30	24	1	2006-06-20 12:29:40
DROP TABLE t1, t2;
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CREATE TABLE t1 (i INT);
(SELECT i FROM t1) UNION (SELECT i FROM t1);
i
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SELECT sql_no_cache * FROM t1 WHERE NOT EXISTS
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(
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(SELECT i FROM t1) UNION
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(SELECT i FROM t1)
);
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i
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SELECT * FROM t1
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WHERE NOT EXISTS (((SELECT i FROM t1) UNION (SELECT i FROM t1)));
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION (SELECT i FROM t1)))' at line 2
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explain select ((select t11.i from t1 t11) union (select t12.i from t1 t12))
from t1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'union (select t12.i from t1 t12))
from t1' at line 1
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explain select * from t1 where not exists
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((select t11.i from t1 t11) union (select t12.i from t1 t12));
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
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DROP TABLE t1;
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CREATE TABLE t1 (a VARCHAR(250), b INT auto_increment, PRIMARY KEY (b));
insert into t1 (a) values (FLOOR(rand() * 100));
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
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SELECT a,
(SELECT REPEAT(' ',250) FROM t1 i1
WHERE i1.b=t1.a ORDER BY RAND() LIMIT 1) AS a
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FROM t1 ORDER BY a LIMIT 5;
a	a
0	NULL
0	NULL
0	NULL
0	NULL
0	NULL
DROP TABLE t1;
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CREATE TABLE t1 (a INT, b INT);
CREATE TABLE t2 (a INT);
INSERT INTO t2 values (1);
INSERT INTO t1 VALUES (1,1),(1,2),(2,3),(3,4);
SELECT (SELECT COUNT(DISTINCT t1.b) from t2) FROM t1 GROUP BY t1.a;
(SELECT COUNT(DISTINCT t1.b) from t2)
2
1
1
SELECT (SELECT COUNT(DISTINCT t1.b) from t2 union select 1 from t2 where 12 < 3)
FROM t1 GROUP BY t1.a;
(SELECT COUNT(DISTINCT t1.b) from t2 union select 1 from t2 where 12 < 3)
2
1
1
SELECT COUNT(DISTINCT t1.b), (SELECT COUNT(DISTINCT t1.b)) FROM t1 GROUP BY t1.a;
COUNT(DISTINCT t1.b)	(SELECT COUNT(DISTINCT t1.b))
2	2
1	1
1	1
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SELECT COUNT(DISTINCT t1.b),
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(SELECT COUNT(DISTINCT t1.b) union select 1 from DUAL where 12 < 3)
FROM t1 GROUP BY t1.a;
COUNT(DISTINCT t1.b)	(SELECT COUNT(DISTINCT t1.b) union select 1 from DUAL where 12 < 3)
2	2
1	1
1	1
SELECT (
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
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)
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FROM t1 GROUP BY t1.a;
(
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
)
2
1
1
SELECT (
SELECT (
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
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)
FROM t1 GROUP BY t1.a LIMIT 1)
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FROM t1 t2
GROUP BY t2.a;
(
SELECT (
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
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)
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FROM t1 GROUP BY t1.a LIMIT 1)
2
2
2
DROP TABLE t1,t2;
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CREATE TABLE t1 (a int, b int auto_increment, PRIMARY KEY (b));
CREATE TABLE t2 (x int auto_increment, y int, z int,
PRIMARY KEY (x), FOREIGN KEY (y) REFERENCES t1 (b));
SET SESSION sort_buffer_size = 32 * 1024;
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SELECT SQL_NO_CACHE COUNT(*)
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FROM (SELECT  a, b, (SELECT x FROM t2 WHERE y=b ORDER BY z DESC LIMIT 1) c
FROM t1) t;
COUNT(*)
3000
SET SESSION sort_buffer_size = 8 * 1024 * 1024;
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SELECT SQL_NO_CACHE COUNT(*)
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FROM (SELECT  a, b, (SELECT x FROM t2 WHERE y=b ORDER BY z DESC LIMIT 1) c
FROM t1) t;
COUNT(*)
3000
DROP TABLE t1,t2;
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CREATE TABLE t1 (id char(4) PRIMARY KEY, c int);
CREATE TABLE t2 (c int);
INSERT INTO t1 VALUES ('aa', 1);
INSERT INTO t2 VALUES (1);
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SELECT * FROM t1
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WHERE EXISTS (SELECT c FROM t2 WHERE c=1
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UNION
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SELECT c from t2 WHERE c=t1.c);
id	c
aa	1
INSERT INTO t1 VALUES ('bb', 2), ('cc', 3), ('dd',1);
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SELECT * FROM t1
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WHERE EXISTS (SELECT c FROM t2 WHERE c=1
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UNION
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SELECT c from t2 WHERE c=t1.c);
id	c
aa	1
bb	2
cc	3
dd	1
INSERT INTO t2 VALUES (2);
CREATE TABLE t3 (c int);
INSERT INTO t3 VALUES (1);
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SELECT * FROM t1
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WHERE EXISTS (SELECT t2.c FROM t2 JOIN t3 ON t2.c=t3.c WHERE t2.c=1
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UNION
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SELECT c from t2 WHERE c=t1.c);
id	c
aa	1
bb	2
cc	3
dd	1
DROP TABLE t1,t2,t3;
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CREATE TABLE t1(f1 int);
CREATE TABLE t2(f2 int, f21 int, f3 timestamp);
INSERT INTO t1 VALUES (1),(1),(2),(2);
INSERT INTO t2 VALUES (1,1,"2004-02-29 11:11:11"), (2,2,"2004-02-29 11:11:11");
SELECT ((SELECT f2 FROM t2 WHERE f21=f1 LIMIT 1) * COUNT(f1)) AS sq FROM t1 GROUP BY f1;
sq
2
4
SELECT (SELECT SUM(1) FROM t2 ttt GROUP BY t2.f3 LIMIT 1) AS tt FROM t2;
tt
2
2
PREPARE stmt1 FROM 'SELECT ((SELECT f2 FROM t2 WHERE f21=f1 LIMIT 1) * COUNT(f1)) AS sq FROM t1 GROUP BY f1';
EXECUTE stmt1;
sq
2
4
EXECUTE stmt1;
sq
2
4
DEALLOCATE PREPARE stmt1;
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SELECT f2, AVG(f21),
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(SELECT t.f3 FROM t2 AS t WHERE t2.f2=t.f2 AND t.f3=MAX(t2.f3)) AS test
FROM t2 GROUP BY f2;
f2	AVG(f21)	test
1	1.0000	2004-02-29 11:11:11
2	2.0000	2004-02-29 11:11:11
DROP TABLE t1,t2;
CREATE TABLE t1 (a int, b INT, c CHAR(10) NOT NULL);
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INSERT INTO t1 VALUES
(1,1,'a'), (1,2,'b'), (1,3,'c'), (1,4,'d'), (1,5,'e'),
(2,1,'f'), (2,2,'g'), (2,3,'h'), (3,4,'i'), (3,3,'j'),
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(3,2,'k'), (3,1,'l'), (1,9,'m');
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SELECT a, MAX(b),
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b)) AS test
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FROM t1 GROUP BY a;
a	MAX(b)	test
1	9	m
2	3	h
3	4	i
DROP TABLE t1;
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DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
DROP TABLE IF EXISTS t1xt2;
CREATE TABLE t1 (
id_1 int(5) NOT NULL,
t varchar(4) DEFAULT NULL
);
CREATE TABLE t2 (
id_2 int(5) NOT NULL,
t varchar(4) DEFAULT NULL
);
CREATE TABLE t1xt2 (
id_1 int(5) NOT NULL,
id_2 int(5) NOT NULL
);
INSERT INTO t1 VALUES (1, 'a'), (2, 'b'), (3, 'c'), (4, 'd');
INSERT INTO t2 VALUES (2, 'bb'), (3, 'cc'), (4, 'dd'), (12, 'aa');
INSERT INTO t1xt2 VALUES (2, 2), (3, 3), (4, 4);
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
1
2
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN ((SELECT t1xt2.id_2 FROM t1xt2 where t1.id_1 = t1xt2.id_1)));
id_1
1
2
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (((SELECT t1xt2.id_2 FROM t1xt2 where t1.id_1 = t1xt2.id_1))));
id_1
1
2
3
4
insert INTO t1xt2 VALUES (1, 12);
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
2
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
2
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
2
3
4
insert INTO t1xt2 VALUES (2, 12);
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
1
2
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
1
2
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
1
2
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
3
4
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE t1xt2;
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CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (3), (1), (2);
SELECT 'this is ' 'a test.' AS col1, a AS col2 FROM t1;
col1	col2
this is a test.	3
this is a test.	1
this is a test.	2
SELECT * FROM (SELECT 'this is ' 'a test.' AS col1, a AS t2 FROM t1) t;
col1	t2
this is a test.	3
this is a test.	1
this is a test.	2
DROP table t1;
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CREATE TABLE t1 (a int, b int);
CREATE TABLE t2 (m int, n int);
INSERT INTO t1 VALUES (2,2), (2,2), (3,3), (3,3), (3,3), (4,4);
INSERT INTO t2 VALUES (1,11), (2,22), (3,32), (4,44), (4,44);
SELECT COUNT(*), a,
(SELECT m FROM t2 WHERE m = count(*) LIMIT 1)
FROM t1 GROUP BY a;
COUNT(*)	a	(SELECT m FROM t2 WHERE m = count(*) LIMIT 1)
2	2	2
3	3	3
1	4	1
SELECT COUNT(*), a,
(SELECT MIN(m) FROM t2 WHERE m = count(*))
FROM t1 GROUP BY a;
COUNT(*)	a	(SELECT MIN(m) FROM t2 WHERE m = count(*))
2	2	2
3	3	3
1	4	1
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SELECT COUNT(*), a
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FROM t1 GROUP BY a
HAVING (SELECT MIN(m) FROM t2 WHERE m = count(*)) > 1;
COUNT(*)	a
2	2
3	3
DROP TABLE t1,t2;
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CREATE TABLE t1 (a int, b int);
CREATE TABLE t2 (m int, n int);
INSERT INTO t1 VALUES (2,2), (2,2), (3,3), (3,3), (3,3), (4,4);
INSERT INTO t2 VALUES (1,11), (2,22), (3,32), (4,44), (4,44);
SELECT COUNT(*) c, a,
(SELECT GROUP_CONCAT(COUNT(a)) FROM t2 WHERE m = a)
FROM t1 GROUP BY a;
c	a	(SELECT GROUP_CONCAT(COUNT(a)) FROM t2 WHERE m = a)
2	2	2
3	3	3
1	4	1,1
SELECT COUNT(*) c, a,
(SELECT GROUP_CONCAT(COUNT(a)+1) FROM t2 WHERE m = a)
FROM t1 GROUP BY a;
c	a	(SELECT GROUP_CONCAT(COUNT(a)+1) FROM t2 WHERE m = a)
2	2	3
3	3	4
1	4	2,2
DROP table t1,t2;
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CREATE TABLE t1 (a int, b INT, d INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
INSERT INTO t1 VALUES (1,1,0,'a'), (1,2,0,'b'), (1,3,0,'c'), (1,4,0,'d'),
(1,5,0,'e'), (2,1,0,'f'), (2,2,0,'g'), (2,3,0,'h'), (3,4,0,'i'), (3,3,0,'j'),
(3,2,0,'k'), (3,1,0,'l'), (1,9,0,'m'), (1,0,10,'n'), (2,0,5,'o'), (3,0,7,'p');
SELECT a, MAX(b),
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(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b + 0)) as test
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FROM t1 GROUP BY a;
a	MAX(b)	test
1	9	m
2	3	h
3	4	i
SELECT a x, MAX(b),
(SELECT t.c FROM t1 AS t WHERE x=t.a AND t.b=MAX(t1.b + 0)) as test
FROM t1 GROUP BY a;
x	MAX(b)	test
1	9	m
2	3	h
3	4	i
SELECT a, AVG(b),
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=AVG(t1.b)) AS test
FROM t1 WHERE t1.d=0 GROUP BY a;
a	AVG(b)	test
1	4.0000	d
2	2.0000	g
3	2.5000	NULL
SELECT tt.a,
(SELECT (SELECT c FROM t1 as t WHERE t1.a=t.a AND t.d=MAX(t1.b + tt.a)
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LIMIT 1) FROM t1 WHERE t1.a=tt.a GROUP BY a LIMIT 1) as test
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FROM t1 as tt;
a	test
1	n
1	n
1	n
1	n
1	n
1	n
1	n
2	o
2	o
2	o
2	o
3	p
3	p
3	p
3	p
3	p
SELECT tt.a,
(SELECT (SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.d=MAX(t1.b + tt.a)
LIMIT 1)
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FROM t1 WHERE t1.a=tt.a GROUP BY a LIMIT 1) as test
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FROM t1 as tt GROUP BY tt.a;
a	test
1	n
2	o
3	p
SELECT tt.a, MAX(
(SELECT (SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.d=MAX(t1.b + tt.a)
LIMIT 1)
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FROM t1 WHERE t1.a=tt.a GROUP BY a LIMIT 1)) as test
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FROM t1 as tt GROUP BY tt.a;
a	test
1	n
2	o
3	p
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DROP TABLE t1;
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CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (2,22),(1,11),(2,22);
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
a
1
2
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
a
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
a
1
2
SET @@sql_mode='ansi';
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
ERROR HY000: Invalid use of group function
SET @@sql_mode=default;
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DROP TABLE t1;
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CREATE TABLE t1 (a INT);
INSERT INTO t1 values (1),(1),(1),(1);
CREATE TABLE t2 (x INT);
INSERT INTO t1 values (1000),(1001),(1002);
SELECT SUM( (SELECT COUNT(a) FROM t2) ) FROM t1;
ERROR HY000: Invalid use of group function
SELECT SUM( (SELECT SUM(COUNT(a)) FROM t2) ) FROM t1;
ERROR HY000: Invalid use of group function
SELECT COUNT(1) FROM DUAL;
COUNT(1)
1
SELECT SUM( (SELECT AVG( (SELECT t1.a FROM t2) ) FROM DUAL) ) FROM t1;
ERROR HY000: Invalid use of group function
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SELECT
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SUM( (SELECT AVG( (SELECT COUNT(*) FROM t1 t HAVING t1.a < 12) ) FROM t2) )
FROM t1;
ERROR HY000: Invalid use of group function
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SELECT t1.a as XXA,
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SUM( (SELECT AVG( (SELECT COUNT(*) FROM t1 t HAVING XXA < 12) ) FROM t2) )
FROM t1;
ERROR HY000: Invalid use of group function
DROP TABLE t1,t2;
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CREATE TABLE t1 (a int, b int, KEY (a));
INSERT INTO t1 VALUES (1,1),(2,1);
EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT COUNT(*) FROM t1 GROUP BY b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ref	a	a	5	const	1	Using where; Using index
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	Using temporary; Using filesort
DROP TABLE t1;
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CREATE TABLE t1 (id int NOT NULL, st CHAR(2), INDEX idx(id));
INSERT INTO t1 VALUES
(3,'FL'), (2,'GA'), (4,'FL'), (1,'GA'), (5,'NY'), (7,'FL'), (6,'NY');
CREATE TABLE t2 (id int NOT NULL, INDEX idx(id));
INSERT INTO t2 VALUES (7), (5), (1), (3);
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SELECT id, st FROM t1
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WHERE st IN ('GA','FL') AND EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id);
id	st
3	FL
1	GA
7	FL
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SELECT id, st FROM t1
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WHERE st IN ('GA','FL') AND EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id)
GROUP BY id;
id	st
1	GA
3	FL
7	FL
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SELECT id, st FROM t1
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WHERE st IN ('GA','FL') AND NOT EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id);
id	st
2	GA
4	FL
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SELECT id, st FROM t1
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WHERE st IN ('GA','FL') AND NOT EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id)
GROUP BY id;
id	st
2	GA
4	FL
DROP TABLE t1,t2;
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CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
EXPLAIN EXTENDED
SELECT * FROM (SELECT count(*) FROM t1 GROUP BY a) as res;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary; Using filesort
Warnings:
Note	1003	select `res`.`count(*)` AS `count(*)` from (select count(0) AS `count(*)` from `test`.`t1` group by `test`.`t1`.`a`) `res`
DROP TABLE t1;
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CREATE TABLE t1 (
a varchar(255) default NULL,
b timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
INDEX idx(a,b)
);
CREATE TABLE t2 (
a varchar(255) default NULL
);
INSERT INTO t1 VALUES ('abcdefghijk','2007-05-07 06:00:24');
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO `t1` VALUES ('asdf','2007-02-08 01:11:26');
INSERT INTO `t2` VALUES ('abcdefghijk');
INSERT INTO `t2` VALUES ('asdf');
SET session sort_buffer_size=8192;
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Warnings:
Warning	1292	Truncated incorrect sort_buffer_size value: '8192'
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SELECT (SELECT 1 FROM  t1 WHERE t1.a=t2.a ORDER BY t1.b LIMIT 1) AS d1 FROM t2;
d1
1
1
DROP TABLE t1,t2;
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CREATE TABLE t1 (a INTEGER, b INTEGER);
CREATE TABLE t2 (x INTEGER);
INSERT INTO t1 VALUES (1,11), (2,22), (2,22);
INSERT INTO t2 VALUES (1), (2);
SELECT a, COUNT(b), (SELECT COUNT(b) FROM t2) FROM t1 GROUP BY a;
ERROR 21000: Subquery returns more than 1 row
SELECT a, COUNT(b), (SELECT COUNT(b)+0 FROM t2) FROM t1 GROUP BY a;
ERROR 21000: Subquery returns more than 1 row
SELECT (SELECT SUM(t1.a)/AVG(t2.x) FROM t2) FROM t1;
(SELECT SUM(t1.a)/AVG(t2.x) FROM t2)
3.3333
DROP TABLE t1,t2;
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 VALUES (1, 2), (1,3), (1,4), (2,1), (2,2);
SELECT a1.a, COUNT(*) FROM t1 a1 WHERE a1.a = 1
AND EXISTS( SELECT a2.a FROM t1 a2 WHERE a2.a = a1.a)
GROUP BY a1.a;
a	COUNT(*)
1	3
DROP TABLE t1;
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT);
INSERT INTO t1 VALUES (1),(2);
INSERT INTO t2 VALUES (1),(2);
SELECT (SELECT SUM(t1.a) FROM t2 WHERE a=0) FROM t1;
(SELECT SUM(t1.a) FROM t2 WHERE a=0)
NULL
SELECT (SELECT SUM(t1.a) FROM t2 WHERE a!=0) FROM t1;
ERROR 21000: Subquery returns more than 1 row
SELECT (SELECT SUM(t1.a) FROM t2 WHERE a=1) FROM t1;
(SELECT SUM(t1.a) FROM t2 WHERE a=1)
3
DROP TABLE t1,t2;
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CREATE TABLE t1 (a1 INT, a2 INT);
CREATE TABLE t2 (b1 INT, b2 INT);
INSERT INTO t1 VALUES (100, 200);
INSERT INTO t1 VALUES (101, 201);
INSERT INTO t2 VALUES (101, 201);
INSERT INTO t2 VALUES (103, 203);
SELECT ((a1,a2) IN (SELECT * FROM t2 WHERE b2 > 0)) IS NULL FROM t1;
((a1,a2) IN (SELECT * FROM t2 WHERE b2 > 0)) IS NULL
0
0
DROP TABLE t1, t2;
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CREATE TABLE t1 (s1 BINARY(5), s2 VARBINARY(5));
INSERT INTO t1 VALUES (0x41,0x41), (0x42,0x42), (0x43,0x43);
SELECT s1, s2 FROM t1 WHERE s2 IN (SELECT s1 FROM t1);
s1	s2
SELECT s1, s2 FROM t1 WHERE (s2, 10) IN (SELECT s1, 10 FROM t1);
s1	s2
CREATE INDEX I1 ON t1 (s1);
CREATE INDEX I2 ON t1 (s2);
SELECT s1, s2 FROM t1 WHERE s2 IN (SELECT s1 FROM t1);
s1	s2
SELECT s1, s2 FROM t1 WHERE (s2, 10) IN (SELECT s1, 10 FROM t1);
s1	s2
TRUNCATE t1;
INSERT INTO t1 VALUES (0x41,0x41);
SELECT * FROM t1 WHERE s1 = (SELECT s2 FROM t1);
s1	s2
DROP TABLE t1;
CREATE TABLE t1 (a1 VARBINARY(2) NOT NULL DEFAULT '0', PRIMARY KEY (a1));
CREATE TABLE t2 (a2 BINARY(2) default '0', INDEX (a2));
CREATE TABLE t3 (a3 BINARY(2) default '0');
INSERT INTO t1 VALUES (1),(2),(3),(4);
INSERT INTO t2 VALUES (1),(2),(3);
INSERT INTO t3 VALUES (1),(2),(3);
SELECT LEFT(t2.a2, 1) FROM t2,t3 WHERE t3.a3=t2.a2;
LEFT(t2.a2, 1)
1
2
3
SELECT t1.a1, t1.a1 in (SELECT t2.a2 FROM t2,t3 WHERE t3.a3=t2.a2) FROM t1;
a1	t1.a1 in (SELECT t2.a2 FROM t2,t3 WHERE t3.a3=t2.a2)
1	0
2	0
3	0
4	0
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (a1 BINARY(3) PRIMARY KEY, b1 VARBINARY(3));
CREATE TABLE t2 (a2 VARBINARY(3) PRIMARY KEY);
CREATE TABLE t3 (a3 VARBINARY(3) PRIMARY KEY);
INSERT INTO t1 VALUES (1,10), (2,20), (3,30), (4,40);
INSERT INTO t2 VALUES (2), (3), (4), (5);
INSERT INTO t3 VALUES (10), (20), (30);
SELECT LEFT(t1.a1,1) FROM t1,t3 WHERE t1.b1=t3.a3;
LEFT(t1.a1,1)
1
2
3
SELECT a2 FROM t2 WHERE t2.a2 IN (SELECT t1.a1 FROM t1,t3 WHERE t1.b1=t3.a3);
a2
DROP TABLE t1, t2, t3;
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CREATE TABLE t1 (a CHAR(1), b VARCHAR(10));
INSERT INTO t1 VALUES ('a', 'aa');
INSERT INTO t1 VALUES ('a', 'aaa');
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
a	b
CREATE INDEX I1 ON t1 (a);
CREATE INDEX I2 ON t1 (b);
EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DEPENDENT SUBQUERY	t1	index_subquery	I1	I1	2	func	2	Using index; Using where
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
a	b
CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10));
INSERT INTO t2 SELECT * FROM t1;
CREATE INDEX I1 ON t2 (a);
CREATE INDEX I2 ON t2 (b);
EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DEPENDENT SUBQUERY	t2	index_subquery	I1	I1	4	func	2	Using index; Using where
SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
a	b
EXPLAIN
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DEPENDENT SUBQUERY	t1	index_subquery	I1	I1	2	func	2	Using index; Using where
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
a	b
DROP TABLE t1,t2;
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CREATE TABLE t1(a INT, b INT);
INSERT INTO t1 VALUES (1,1), (1,2), (2,3), (2,4);
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EXPLAIN
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SELECT a AS out_a, MIN(b) FROM t1
WHERE b > (SELECT MIN(b) FROM t1 WHERE a = out_a)
GROUP BY a;
ERROR 42S22: Unknown column 'out_a' in 'where clause'
SELECT a AS out_a, MIN(b) FROM t1
WHERE b > (SELECT MIN(b) FROM t1 WHERE a = out_a)
GROUP BY a;
ERROR 42S22: Unknown column 'out_a' in 'where clause'
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EXPLAIN
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SELECT a AS out_a, MIN(b) FROM t1 t1_outer
WHERE b > (SELECT MIN(b) FROM t1 WHERE a = t1_outer.a)
GROUP BY a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1_outer	ALL	NULL	NULL	NULL	NULL	4	Using where; Using temporary; Using filesort
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where
SELECT a AS out_a, MIN(b) FROM t1 t1_outer
WHERE b > (SELECT MIN(b) FROM t1 WHERE a = t1_outer.a)
GROUP BY a;
out_a	MIN(b)
1	2
2	4
DROP TABLE t1;
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CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT);
INSERT INTO t1 VALUES (1),(2);
INSERT INTO t2 VALUES (1),(2);
SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a));
2
2
2
EXPLAIN EXTENDED
SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a));
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
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Warnings:
Note	1276	Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
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Note	1003	select 2 AS `2` from `test`.`t1` where exists(select 1 from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`))
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EXPLAIN EXTENDED
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SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a) UNION
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(SELECT 1 FROM t2 WHERE t1.a = t2.a));
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1276	Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
Note	1276	Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #1
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Note	1003	select 2 AS `2` from `test`.`t1` where exists((select 1 from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)) union (select 1 from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)))
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DROP TABLE t1,t2;
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create table t1(f11 int, f12 int);
create table t2(f21 int unsigned not null, f22 int, f23 varchar(10));
insert into t1 values(1,1),(2,2), (3, 3);
set session sort_buffer_size= 33*1024;
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select count(*) from t1 where f12 =
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(select f22 from t2 where f22 = f12 order by f21 desc, f22, f23 limit 1);
count(*)
3
drop table t1,t2;
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CREATE TABLE t4 (
f7 varchar(32) collate utf8_bin NOT NULL default '',
f10 varchar(32) collate utf8_bin default NULL,
PRIMARY KEY  (f7)
);
INSERT INTO t4 VALUES(1,1), (2,null);
CREATE TABLE t2 (
f4 varchar(32) collate utf8_bin NOT NULL default '',
f2 varchar(50) collate utf8_bin default NULL,
f3 varchar(10) collate utf8_bin default NULL,
PRIMARY KEY  (f4),
UNIQUE KEY uk1 (f2)
);
INSERT INTO t2 VALUES(1,1,null), (2,2,null);
CREATE TABLE t1 (
f8 varchar(32) collate utf8_bin NOT NULL default '',
f1 varchar(10) collate utf8_bin default NULL,
f9 varchar(32) collate utf8_bin default NULL,
PRIMARY KEY  (f8)
);
INSERT INTO t1 VALUES (1,'P',1), (2,'P',1), (3,'R',2);
CREATE TABLE t3 (
f6 varchar(32) collate utf8_bin NOT NULL default '',
f5 varchar(50) collate utf8_bin default NULL,
PRIMARY KEY (f6)
);
INSERT INTO t3 VALUES (1,null), (2,null);
SELECT
IF(t1.f1 = 'R', a1.f2, t2.f2) AS a4,
IF(t1.f1 = 'R', a1.f3, t2.f3) AS f3,
SUM(
IF(
(SELECT VPC.f2
FROM t2 VPC, t4 a2, t2 a3
WHERE
VPC.f4 = a2.f10 AND a3.f2 = a4
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LIMIT 1) IS NULL,
0,
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t3.f5
)
) AS a6
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FROM
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t2, t3, t1 JOIN t2 a1 ON t1.f9 = a1.f4
GROUP BY a4;
a4	f3	a6
1	NULL	NULL
2	NULL	NULL
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DROP TABLE t1, t2, t3, t4;
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create table t1 (a float(5,4) zerofill);
create table t2 (a float(5,4),b float(2,0));
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select t1.a from t1 where
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t1.a= (select b from t2 limit 1) and not
t1.a= (select a from t2 limit 1) ;
a
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drop table t1, t2;
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CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 GROUP BY a);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary; Using filesort
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Warnings:
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Note	1003	select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,<exists>(select 1 from `test`.`t1` group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(1))))
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EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 WHERE a > 3 GROUP BY a);
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using temporary; Using filesort
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Warnings:
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Note	1003	select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,<exists>(select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(1))))
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DROP TABLE t1;
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#
# Bug#45061: Incorrectly market field caused wrong result.
#
CREATE TABLE `C` (
`int_nokey` int(11) NOT NULL,
`int_key` int(11) NOT NULL,
KEY `int_key` (`int_key`)
);
INSERT INTO `C` VALUES (9,9), (0,0), (8,6), (3,6), (7,6), (0,4),
(1,7), (9,4), (0,8), (9,4), (0,7), (5,5), (0,0), (8,5), (8,7),
(5,2), (1,8), (7,0), (0,9), (9,5);
SELECT * FROM C WHERE `int_key` IN (SELECT `int_nokey`);
int_nokey	int_key
9	9
0	0
5	5
0	0
EXPLAIN EXTENDED SELECT * FROM C WHERE `int_key` IN (SELECT `int_nokey`);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	C	ALL	NULL	NULL	NULL	NULL	20	100.00	Using where
DROP TABLE C;
# End of test for bug#45061.
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#
# Bug #46749: Segfault in add_key_fields() with outer subquery level 
#   field references
#
CREATE TABLE t1 (
a int,
b int,
UNIQUE (a), KEY (b)
);
INSERT INTO t1 VALUES (1,1), (2,1);
CREATE TABLE st1 like t1;
INSERT INTO st1 VALUES (1,1), (2,1);
CREATE TABLE st2 like t1;
INSERT INTO st2 VALUES (1,1), (2,1);
EXPLAIN
SELECT MAX(b), (SELECT COUNT(*) FROM st1,st2 WHERE st2.b <= t1.b)
FROM t1 
WHERE a = 230;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
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2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
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SELECT MAX(b), (SELECT COUNT(*) FROM st1,st2 WHERE st2.b <= t1.b)
FROM t1 
WHERE a = 230;
MAX(b)	(SELECT COUNT(*) FROM st1,st2 WHERE st2.b <= t1.b)
NULL	0
DROP TABLE t1, st1, st2;
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#
# Bug #48709: Assertion failed in sql_select.cc:11782: 
#   int join_read_key(JOIN_TAB*)
#
CREATE TABLE t1 (pk int PRIMARY KEY, int_key int);
INSERT INTO t1 VALUES (10,1), (14,1);
CREATE TABLE t2 (pk int PRIMARY KEY, int_key int);
INSERT INTO t2 VALUES (3,3), (5,NULL), (7,3);
# should have eq_ref for t1
EXPLAIN
SELECT * FROM t2 outr
WHERE outr.int_key NOT IN (SELECT t1.pk FROM t1, t2)  
ORDER BY outr.pk;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
x	x	outr	ALL	x	x	x	x	x	x
x	x	t1	eq_ref	x	x	x	x	x	x
x	x	t2	index	x	x	x	x	x	x
# should not crash on debug binaries
SELECT * FROM t2 outr
WHERE outr.int_key NOT IN (SELECT t1.pk FROM t1, t2)  
ORDER BY outr.pk;
pk	int_key
3	3
7	3
DROP TABLE t1,t2;
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End of 5.0 tests.
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CREATE TABLE t1 (a INT, b INT);
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INSERT INTO t1 VALUES (2,22),(1,11),(2,22);
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
a
1
2
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
a
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
a
1
2
SET @@sql_mode='ansi';
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
ERROR HY000: Invalid use of group function
SET @@sql_mode=default;
DROP TABLE t1;
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CREATE TABLE t1 (s1 CHAR(1));
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INSERT INTO t1 VALUES ('a');
SELECT * FROM t1 WHERE _utf8'a' = ANY (SELECT s1 FROM t1);
s1
a
DROP TABLE t1;
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CREATE TABLE t1(c INT, KEY(c));
CREATE TABLE t2(a INT, b INT);
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INSERT INTO t2 VALUES (1, 10), (2, NULL);
INSERT INTO t1 VALUES (1), (3);
SELECT * FROM t2 WHERE b NOT IN (SELECT max(t.c) FROM t1, t1 t WHERE t.c>10);
a	b
DROP TABLE t1,t2;
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CREATE TABLE t1(pk INT PRIMARY KEY, a INT, INDEX idx(a));
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INSERT INTO t1 VALUES (1, 10), (3, 30), (2, 20);
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CREATE TABLE t2(pk INT PRIMARY KEY, a INT, b INT, INDEX idxa(a));
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INSERT INTO t2 VALUES (2, 20, 700), (1, 10, 200), (4, 10, 100);
SELECT * FROM t1
WHERE EXISTS (SELECT DISTINCT a FROM t2 WHERE t1.a < t2.a ORDER BY b);
pk	a
1	10
3	30
2	20
DROP TABLE t1,t2;
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CREATE TABLE t1 (a INT, b INT, PRIMARY KEY (a), KEY b (b));
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INSERT INTO t1 VALUES (1,NULL), (9,NULL);
CREATE TABLE t2 (
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a INT,
b INT,
c INT,
d INT,
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PRIMARY KEY (a),
UNIQUE KEY b (b,c,d),
KEY b_2 (b),
KEY c (c),
KEY d (d)
);
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INSERT INTO t2 VALUES
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(43, 2, 11 ,30),
(44, 2, 12 ,30),
(45, 1, 1  ,10000),
(46, 1, 2  ,10000),
(556,1, 32 ,10000);
CREATE TABLE t3 (
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a INT,
b INT,
c INT,
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PRIMARY KEY (a),
UNIQUE KEY b (b,c),
KEY c (c),
KEY b_2 (b)
);
INSERT INTO t3 VALUES (1,1,1), (2,32,1);
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explain
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SELECT t1.a, (SELECT 1 FROM t2 WHERE t2.b=t3.c AND t2.c=t1.a ORDER BY t2.d LIMIT 1) AS incorrect FROM t1, t3 WHERE t3.b=t1.a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	index	b,b_2	b	10	NULL	2	Using index
1	PRIMARY	t1	eq_ref	PRIMARY	PRIMARY	4	test.t3.b	1	Using index
2	DEPENDENT SUBQUERY	t2	index	b,b_2,c	d	5	NULL	1	Using where
SELECT t1.a, (SELECT 1 FROM t2 WHERE t2.b=t3.c AND t2.c=t1.a ORDER BY t2.d LIMIT 1) AS incorrect FROM t1, t3 WHERE t3.b=t1.a;
a	incorrect
1	1
DROP TABLE t1,t2,t3;
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CREATE TABLE t1 (id int);
CREATE TABLE t2 (id int, c int);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
CREATE VIEW v1 AS
SELECT t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
UPDATE v1 SET c=1;
CREATE VIEW v2 (a,b) AS
SELECT t2.id, t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
INSERT INTO v2(a,b) VALUES (2,2);
ERROR HY000: CHECK OPTION failed 'test.v2'
INSERT INTO v2(a,b) VALUES (1,2);
SELECT * FROM v1;
c
1
1
1
1
2
2
CREATE VIEW v3 AS
SELECT t2.c AS c FROM t2
WHERE 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
DELETE FROM v3;
DROP VIEW v1,v2,v3;
DROP TABLE t1,t2;
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#
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# Bug#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
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#
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create table t1(id integer primary key, g integer, v integer, s char(1));
create table t2(id integer primary key, g integer, v integer, s char(1));
insert into t1 values
(10, 10, 10,   'l'),
(20, 20, 20,   'l'),
(40, 40, 40,   'l'),
(41, 40, null, 'l'),
(50, 50, 50,   'l'),
(51, 50, null, 'l'),
(60, 60, 60,   'l'),
(61, 60, null, 'l'),
(70, 70, 70,   'l'),
(90, 90, null, 'l');
insert into t2 values
(10, 10, 10,   'r'),
(30, 30, 30,   'r'),
(50, 50, 50,   'r'),
(60, 60, 60,   'r'),
(61, 60, null, 'r'),
(70, 70, 70,   'r'),
(71, 70, null, 'r'),
(80, 80, 80,   'r'),
(81, 80, null, 'r'),
(100,100,null, 'r');
select *
from t1
where v in(select v
from t2
where t1.g=t2.g) is unknown;
id	g	v	s
51	50	NULL	l
61	60	NULL	l
drop table t1, t2;
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#
# Bug#33204: INTO is allowed in subselect, causing inconsistent results
#
CREATE TABLE t1( a INT );
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2( a INT, b INT );
SELECT * 
FROM (SELECT a INTO @var FROM t1 WHERE a = 2) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @var FROM t1 WHERE a = 2) t1a' at line 2
SELECT * 
FROM (SELECT a INTO OUTFILE 'file' FROM t1 WHERE a = 2) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' FROM t1 WHERE a = 2) t1a' at line 2
SELECT * 
FROM (SELECT a INTO DUMPFILE 'file' FROM t1 WHERE a = 2) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' FROM t1 WHERE a = 2) t1a' at line 2
SELECT * FROM ( 
SELECT 1 a 
UNION 
SELECT a INTO @var FROM t1 WHERE a = 2 
) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @var FROM t1 WHERE a = 2 
) t1a' at line 4
SELECT * FROM ( 
SELECT 1 a 
UNION 
SELECT a INTO OUTFILE 'file' FROM t1 WHERE a = 2 
) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' FROM t1 WHERE a = 2 
) t1a' at line 4
SELECT * FROM ( 
SELECT 1 a 
UNION 
SELECT a INTO DUMPFILE 'file' FROM t1 WHERE a = 2 
) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' FROM t1 WHERE a = 2 
) t1a' at line 4
SELECT * FROM (SELECT a FROM t1 WHERE a = 2) t1a;
a
2
SELECT * FROM ( 
SELECT a FROM t1 WHERE a = 2 
UNION 
SELECT a FROM t1 WHERE a = 2 
) t1a;
a
2
SELECT * FROM ( 
SELECT 1 a 
UNION 
SELECT a FROM t1 WHERE a = 2 
UNION 
SELECT a FROM t1 WHERE a = 2 
) t1a;
a
1
2
SELECT * FROM ((SELECT 1 a) UNION SELECT 1 a);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1
SELECT * FROM (SELECT 1 a UNION (SELECT 1 a)) alias;
a
1
SELECT * FROM (SELECT 1 UNION SELECT 1) t1a;
1
1
SELECT * FROM ((SELECT 1 a INTO @a)) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @a)) t1a' at line 1
SELECT * FROM ((SELECT 1 a INTO OUTFILE 'file' )) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' )) t1a' at line 1
SELECT * FROM ((SELECT 1 a INTO DUMPFILE 'file' )) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' )) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION (SELECT 1 a INTO @a)) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @a)) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION (SELECT 1 a INTO DUMPFILE 'file' )) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' )) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION (SELECT 1 a INTO OUTFILE 'file' )) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' )) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION ((SELECT 1 a INTO @a))) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @a))) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION ((SELECT 1 a INTO DUMPFILE 'file' ))) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' ))) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION ((SELECT 1 a INTO OUTFILE 'file' ))) t1a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' ))) t1a' at line 1
SELECT * FROM (SELECT 1 a ORDER BY a) t1a;
a
1
SELECT * FROM (SELECT 1 a UNION SELECT 1 a ORDER BY a) t1a;
a
1
SELECT * FROM (SELECT 1 a UNION SELECT 1 a LIMIT 1) t1a;
a
1
SELECT * FROM (SELECT 1 a UNION SELECT 1 a ORDER BY a LIMIT 1) t1a;
a
1
SELECT * FROM t1 JOIN  (SELECT 1 UNION SELECT 1) alias ON 1;
a	1
1	1
2	1
SELECT * FROM t1 JOIN ((SELECT 1 UNION SELECT 1)) ON 1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')) ON 1' at line 1
SELECT * FROM t1 JOIN  (t1 t1a UNION SELECT 1)  ON 1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ON 1' at line 1
SELECT * FROM t1 JOIN ((t1 t1a UNION SELECT 1)) ON 1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') ON 1' at line 1
SELECT * FROM t1 JOIN  (t1 t1a)  t1a ON 1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 't1a ON 1' at line 1
SELECT * FROM t1 JOIN ((t1 t1a)) t1a ON 1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 't1a ON 1' at line 1
SELECT * FROM t1 JOIN  (t1 t1a)  ON 1;
a	a
1	1
2	1
1	2
2	2
SELECT * FROM t1 JOIN ((t1 t1a)) ON 1;
a	a
1	1
2	1
1	2
2	2
SELECT * FROM (t1 t1a);
a
1
2
SELECT * FROM ((t1 t1a));
a
1
2
SELECT * FROM t1 JOIN  (SELECT 1 t1a) alias ON 1;
a	t1a
1	1
2	1
SELECT * FROM t1 JOIN ((SELECT 1 t1a)) alias ON 1;
a	t1a
1	1
2	1
SELECT * FROM t1 JOIN  (SELECT 1 a)  a ON 1;
a	a
1	1
2	1
SELECT * FROM t1 JOIN ((SELECT 1 a)) a ON 1;
a	a
1	1
2	1
SELECT * FROM (t1 JOIN (SELECT 1) t1a1 ON 1) t1a2;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 't1a2' at line 1
SELECT * FROM t1 WHERE a = ALL ( SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ALL ( SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ANY ( SELECT 3 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION SELECT 1 INTO @a);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @a)' at line 1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION SELECT 1 INTO OUTFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION SELECT 1 INTO DUMPFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ( SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ( SELECT 1 INTO @a);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @a)' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 INTO OUTFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 INTO DUMPFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 UNION SELECT 1 INTO @a);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @a)' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 UNION SELECT 1 INTO OUTFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 UNION SELECT 1 INTO DUMPFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' )' at line 1
SELECT ( SELECT 1 INTO @v );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @v )' at line 1
SELECT ( SELECT 1 INTO OUTFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' )' at line 1
SELECT ( SELECT 1 INTO DUMPFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' )' at line 1
SELECT ( SELECT 1 UNION SELECT 1 INTO @v );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @v )' at line 1
SELECT ( SELECT 1 UNION SELECT 1 INTO OUTFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO OUTFILE 'file' )' at line 1
SELECT ( SELECT 1 UNION SELECT 1 INTO DUMPFILE 'file' );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO DUMPFILE 'file' )' at line 1
SELECT ( SELECT a FROM t1 WHERE a = 1 ), a FROM t1;
( SELECT a FROM t1 WHERE a = 1 )	a
1	1
1	2
SELECT ( SELECT a FROM t1 WHERE a = 1 UNION SELECT 1 ), a FROM t1;
( SELECT a FROM t1 WHERE a = 1 UNION SELECT 1 )	a
1	1
1	2
SELECT * FROM t2 WHERE (a, b) IN (SELECT a, b FROM t2);
a	b
SELECT 1 UNION ( SELECT 1 UNION SELECT 1 );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 )' at line 1
( SELECT 1 UNION SELECT 1 ) UNION SELECT 1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 ) UNION SELECT 1' at line 1
SELECT ( SELECT 1 UNION ( SELECT 1 UNION SELECT 1 ) );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 ) )' at line 1
SELECT ( ( SELECT 1 UNION SELECT 1 ) UNION SELECT 1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1' at line 1
SELECT ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
( SELECT 1 UNION SELECT 1 UNION SELECT 1 )
1
SELECT ((SELECT 1 UNION SELECT 1 UNION SELECT 1));
((SELECT 1 UNION SELECT 1 UNION SELECT 1))
1
SELECT * FROM ( SELECT 1 UNION ( SELECT 1 UNION SELECT 1 ) );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 ) )' at line 1
SELECT * FROM ( ( SELECT 1 UNION SELECT 1 ) UNION SELECT 1 );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') UNION SELECT 1 )' at line 1
SELECT * FROM ( SELECT 1 UNION SELECT 1 UNION SELECT 1 ) a;
1
1
SELECT * FROM t1 WHERE a =     ( SELECT 1 UNION ( SELECT 1 UNION SELECT 1 ) );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 ) )' at line 1
SELECT * FROM t1 WHERE a = ALL ( SELECT 1 UNION ( SELECT 1 UNION SELECT 1 ) );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 ) )' at line 1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION ( SELECT 1 UNION SELECT 1 ) );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 ) )' at line 1
SELECT * FROM t1 WHERE a IN    ( SELECT 1 UNION ( SELECT 1 UNION SELECT 1 ) );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 ) )' at line 1
SELECT * FROM t1 WHERE a =     ( ( SELECT 1 UNION SELECT 1 )  UNION SELECT 1 );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 )' at line 1
SELECT * FROM t1 WHERE a = ALL ( ( SELECT 1 UNION SELECT 1 )  UNION SELECT 1 );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 )  UNION SELECT 1 )' at line 1
SELECT * FROM t1 WHERE a = ANY ( ( SELECT 1 UNION SELECT 1 )  UNION SELECT 1 );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 )  UNION SELECT 1 )' at line 1
SELECT * FROM t1 WHERE a IN    ( ( SELECT 1 UNION SELECT 1 )  UNION SELECT 1 );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION SELECT 1 )' at line 1
SELECT * FROM t1 WHERE a =     ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ALL ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a IN    ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE EXISTS ( SELECT 1 UNION SELECT 1 INTO @v );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @v )' at line 1
SELECT EXISTS(SELECT 1+1);
EXISTS(SELECT 1+1)
1
SELECT EXISTS(SELECT 1+1 INTO @test);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @test)' at line 1
SELECT * FROM t1 WHERE a IN ( SELECT 1 UNION SELECT 1 INTO @v );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @v )' at line 1
SELECT * FROM t1 WHERE EXISTS ( SELECT 1 INTO @v );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @v )' at line 1
SELECT * FROM t1 WHERE a IN ( SELECT 1 INTO @v );
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INTO @v )' at line 1
DROP TABLE t1, t2;
4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875
CREATE TABLE t1 (a ENUM('rainbow'));
INSERT INTO t1 VALUES (),(),(),(),();
SELECT 1 FROM t1 GROUP BY (SELECT 1 FROM t1 ORDER BY AVG(LAST_INSERT_ID()));
1
1
DROP TABLE t1;
CREATE TABLE t1 (a LONGBLOB);
INSERT INTO t1 SET a = 'aaaa';
INSERT INTO t1 SET a = 'aaaa';
SELECT 1 FROM t1 GROUP BY
(SELECT LAST_INSERT_ID() FROM t1 ORDER BY MIN(a) ASC LIMIT 1);
1
1
DROP TABLE t1;
4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888
#
# Bug #49512 : subquery with aggregate function crash 
#   subselect_single_select_engine::exec()
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES();
# should not crash
SELECT 1 FROM t1 WHERE a <> SOME
(
SELECT MAX((SELECT a FROM t1 LIMIT 1)) AS d
FROM t1,t1 a
);
1
DROP TABLE t1;
4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900
#
# Bug #45989 take 2 : memory leak after explain encounters an 
# error in the query
#
CREATE TABLE t1(a LONGTEXT);
INSERT INTO t1 VALUES (repeat('a',@@global.max_allowed_packet));
INSERT INTO t1 VALUES (repeat('b',@@global.max_allowed_packet));
EXPLAIN EXTENDED SELECT DISTINCT 1 FROM t1,
(SELECT DISTINCTROW a AS away FROM t1 GROUP BY a WITH ROLLUP) AS d1  
WHERE t1.a = d1.a;
ERROR 42S22: Unknown column 'd1.a' in 'where clause'
DROP TABLE t1;
4901
End of 5.1 tests.
4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990
Set up test tables.
CREATE TABLE t1 (
t1_id INT UNSIGNED,
PRIMARY KEY(t1_id)
) Engine=MyISAM;
INSERT INTO t1 (t1_id) VALUES (1), (2), (3), (4), (5);
CREATE TABLE t2 SELECT * FROM t1;
CREATE TABLE t3 (
t3_id INT UNSIGNED AUTO_INCREMENT,
t1_id INT UNSIGNED,
amount DECIMAL(16,2),
PRIMARY KEY(t3_id),
KEY(t1_id)
) Engine=MyISAM;
INSERT INTO t3 (t1_id, t3_id, amount) 
VALUES (1, 1, 100.00), (2, 2, 200.00), (4, 4, 400.00);
This is the 'inner query' running by itself.
Produces correct results.
SELECT
t1.t1_id,
IFNULL((SELECT SUM(amount) FROM t3 WHERE t3.t1_id=t1.t1_id), 0) AS total_amount
FROM
t1
LEFT JOIN t2 ON t2.t1_id=t1.t1_id
GROUP BY
t1.t1_id
;
t1_id	total_amount
1	100.00
2	200.00
3	0.00
4	400.00
5	0.00
SELECT * FROM (the same inner query)
Produces correct results.
SELECT * FROM (
SELECT
t1.t1_id,
IFNULL((SELECT SUM(amount) FROM t3 WHERE t3.t1_id=t1.t1_id), 0) AS total_amount
FROM
t1
LEFT JOIN t2 ON t2.t1_id=t1.t1_id
GROUP BY
t1.t1_id
) AS t;
t1_id	total_amount
1	100.00
2	200.00
3	0.00
4	400.00
5	0.00
Now make t2.t1_id part of a key.
ALTER TABLE t2 ADD PRIMARY KEY(t1_id);
Same inner query by itself.
Still correct results.
SELECT
t1.t1_id,
IFNULL((SELECT SUM(amount) FROM t3 WHERE t3.t1_id=t1.t1_id), 0) AS total_amount
FROM
t1
LEFT JOIN t2 ON t2.t1_id=t1.t1_id
GROUP BY
t1.t1_id;
t1_id	total_amount
1	100.00
2	200.00
3	0
4	400.00
5	0
SELECT * FROM (the same inner query), now with indexes on the LEFT JOIN
SELECT * FROM (
SELECT
t1.t1_id,
IFNULL((SELECT SUM(amount) FROM t3 WHERE t3.t1_id=t1.t1_id), 0) AS total_amount
FROM
t1
LEFT JOIN t2 ON t2.t1_id=t1.t1_id
GROUP BY
t1.t1_id
) AS t;
t1_id	total_amount
1	100.00
2	200.00
3	0.00
4	400.00
5	0.00
DROP TABLE t3;
DROP TABLE t2;
DROP TABLE t1;
4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007
#
# Bug #52711: Segfault when doing EXPLAIN SELECT with 
#  union...order by (select... where...)
#
CREATE TABLE t1 (a VARCHAR(10), FULLTEXT KEY a (a));
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (1),(2);
# Should not crash
EXPLAIN
SELECT * FROM t2 UNION SELECT * FROM t2
ORDER BY (SELECT * FROM t1 WHERE MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE));
# Should not crash
SELECT * FROM t2 UNION SELECT * FROM t2
ORDER BY (SELECT * FROM t1 WHERE MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE));
DROP TABLE t1,t2;
End of 5.1 tests