drop table if exists t1;
set names latin1;
select 'hello',"'hello'",'""hello""','''h''e''l''l''o''',"hel""lo",'hel\'lo';
hello	'hello'	""hello""	'h'e'l'l'o'	hel"lo	hel'lo
hello	'hello'	""hello""	'h'e'l'l'o'	hel"lo	hel'lo
select 'hello' 'monty';
hello
hellomonty
select length('\n\t\r\b\0\_\%\\');
length('\n\t\r\b\0\_\%\\')
10
select bit_length('\n\t\r\b\0\_\%\\');
bit_length('\n\t\r\b\0\_\%\\')
80
select char_length('\n\t\r\b\0\_\%\\');
char_length('\n\t\r\b\0\_\%\\')
10
select length(_latin1'\n\t\n\b\0\\_\\%\\');
length(_latin1'\n\t\n\b\0\\_\\%\\')
10
select concat('monty',' was here ','again'),length('hello'),char(ascii('h')),ord('h');
concat('monty',' was here ','again')	length('hello')	char(ascii('h'))	ord('h')
monty was here again	5	h	104
select locate('he','hello'),locate('he','hello',2),locate('lo','hello',2) ;
locate('he','hello')	locate('he','hello',2)	locate('lo','hello',2)
1	0	4
select instr('hello','HE'), instr('hello',binary 'HE'), instr(binary 'hello','HE');
instr('hello','HE')	instr('hello',binary 'HE')	instr(binary 'hello','HE')
1	0	0
select position(binary 'll' in 'hello'),position('a' in binary 'hello');
position(binary 'll' in 'hello')	position('a' in binary 'hello')
3	0
select left('hello',2),right('hello',2),substring('hello',2,2),mid('hello',1,5) ;
left('hello',2)	right('hello',2)	substring('hello',2,2)	mid('hello',1,5)
he	lo	el	hello
select concat('',left(right(concat('what ',concat('is ','happening')),9),4),'',substring('monty',5,1)) ;
concat('',left(right(concat('what ',concat('is ','happening')),9),4),'',substring('monty',5,1))
happy
select substring_index('www.tcx.se','.',-2),substring_index('www.tcx.se','.',1);
substring_index('www.tcx.se','.',-2)	substring_index('www.tcx.se','.',1)
tcx.se	www
select substring_index('www.tcx.se','tcx',1),substring_index('www.tcx.se','tcx',-1);
substring_index('www.tcx.se','tcx',1)	substring_index('www.tcx.se','tcx',-1)
www.	.se
select substring_index('.tcx.se','.',-2),substring_index('.tcx.se','.tcx',-1);
substring_index('.tcx.se','.',-2)	substring_index('.tcx.se','.tcx',-1)
tcx.se	.se
select substring_index('aaaaaaaaa1','a',1);
substring_index('aaaaaaaaa1','a',1)

select substring_index('aaaaaaaaa1','aa',1);
substring_index('aaaaaaaaa1','aa',1)

select substring_index('aaaaaaaaa1','aa',2);
substring_index('aaaaaaaaa1','aa',2)
aa
select substring_index('aaaaaaaaa1','aa',3);
substring_index('aaaaaaaaa1','aa',3)
aaaa
select substring_index('aaaaaaaaa1','aa',4);
substring_index('aaaaaaaaa1','aa',4)
aaaaaa
select substring_index('aaaaaaaaa1','aa',5);
substring_index('aaaaaaaaa1','aa',5)
aaaaaaaaa1
select substring_index('aaaaaaaaa1','aaa',1);
substring_index('aaaaaaaaa1','aaa',1)

select substring_index('aaaaaaaaa1','aaa',2);
substring_index('aaaaaaaaa1','aaa',2)
aaa
select substring_index('aaaaaaaaa1','aaa',3);
substring_index('aaaaaaaaa1','aaa',3)
aaaaaa
select substring_index('aaaaaaaaa1','aaa',4);
substring_index('aaaaaaaaa1','aaa',4)
aaaaaaaaa1
select substring_index('aaaaaaaaa1','aaaa',1);
substring_index('aaaaaaaaa1','aaaa',1)

select substring_index('aaaaaaaaa1','aaaa',2);
substring_index('aaaaaaaaa1','aaaa',2)
aaaa
select substring_index('aaaaaaaaa1','1',1);
substring_index('aaaaaaaaa1','1',1)
aaaaaaaaa
select substring_index('aaaaaaaaa1','a',-1);
substring_index('aaaaaaaaa1','a',-1)
1
select substring_index('aaaaaaaaa1','aa',-1);
substring_index('aaaaaaaaa1','aa',-1)
1
select substring_index('aaaaaaaaa1','aa',-2);
substring_index('aaaaaaaaa1','aa',-2)
aa1
select substring_index('aaaaaaaaa1','aa',-3);
substring_index('aaaaaaaaa1','aa',-3)
aaaa1
select substring_index('aaaaaaaaa1','aa',-4);
substring_index('aaaaaaaaa1','aa',-4)
aaaaaa1
select substring_index('aaaaaaaaa1','aa',-5);
substring_index('aaaaaaaaa1','aa',-5)
aaaaaaaaa1
select substring_index('aaaaaaaaa1','aaa',-1);
substring_index('aaaaaaaaa1','aaa',-1)
1
select substring_index('aaaaaaaaa1','aaa',-2);
substring_index('aaaaaaaaa1','aaa',-2)
aaa1
select substring_index('aaaaaaaaa1','aaa',-3);
substring_index('aaaaaaaaa1','aaa',-3)
aaaaaa1
select substring_index('aaaaaaaaa1','aaa',-4);
substring_index('aaaaaaaaa1','aaa',-4)

select substring_index('the king of thethe hill','the',-2);
substring_index('the king of thethe hill','the',-2)
the hill
select substring_index('the king of the the hill','the',-2);
substring_index('the king of the the hill','the',-2)
 the hill
select substring_index('the king of the  the hill','the',-2);
substring_index('the king of the  the hill','the',-2)
  the hill
select substring_index('the king of the  the hill',' the ',-1);
substring_index('the king of the  the hill',' the ',-1)
hill
select substring_index('the king of the  the hill',' the ',-2);
substring_index('the king of the  the hill',' the ',-2)
 the hill
select substring_index('the king of the  the hill',' ',-1);
substring_index('the king of the  the hill',' ',-1)
hill
select substring_index('the king of the  the hill',' ',-2);
substring_index('the king of the  the hill',' ',-2)
the hill
select substring_index('the king of the  the hill',' ',-3);
substring_index('the king of the  the hill',' ',-3)
 the hill
select substring_index('the king of the  the hill',' ',-4);
substring_index('the king of the  the hill',' ',-4)
the  the hill
select substring_index('the king of the  the hill',' ',-5);
substring_index('the king of the  the hill',' ',-5)
of the  the hill
select substring_index('the king of the.the hill','the',-2);
substring_index('the king of the.the hill','the',-2)
.the hill
select substring_index('the king of thethethe.the hill','the',-3);
substring_index('the king of thethethe.the hill','the',-3)
the.the hill
select substring_index('the king of thethethe.the hill','the',-1);
substring_index('the king of thethethe.the hill','the',-1)
 hill
select substring_index('the king of the the hill','the',1);
substring_index('the king of the the hill','the',1)

select substring_index('the king of the the hill','the',2);
substring_index('the king of the the hill','the',2)
the king of 
select substring_index('the king of the the hill','the',3);
substring_index('the king of the the hill','the',3)
the king of the 
select concat(':',ltrim('  left  '),':',rtrim('  right  '),':');
concat(':',ltrim('  left  '),':',rtrim('  right  '),':')
:left  :  right:
select concat(':',trim(LEADING FROM ' left'),':',trim(TRAILING FROM ' right '),':');
concat(':',trim(LEADING FROM ' left'),':',trim(TRAILING FROM ' right '),':')
:left: right:
select concat(':',trim(' m '),':',trim(BOTH FROM ' y '),':',trim('*' FROM '*s*'),':');
concat(':',trim(' m '),':',trim(BOTH FROM ' y '),':',trim('*' FROM '*s*'),':')
:m:y:s:
select concat(':',trim(BOTH 'ab' FROM 'ababmyabab'),':',trim(BOTH '*' FROM '***sql'),':');
concat(':',trim(BOTH 'ab' FROM 'ababmyabab'),':',trim(BOTH '*' FROM '***sql'),':')
:my:sql:
select concat(':',trim(LEADING '.*' FROM '.*my'),':',trim(TRAILING '.*' FROM 'sql.*.*'),':');
concat(':',trim(LEADING '.*' FROM '.*my'),':',trim(TRAILING '.*' FROM 'sql.*.*'),':')
:my:sql:
select TRIM("foo" FROM "foo"), TRIM("foo" FROM "foook"), TRIM("foo" FROM "okfoo");
TRIM("foo" FROM "foo")	TRIM("foo" FROM "foook")	TRIM("foo" FROM "okfoo")
	ok	ok
select concat_ws(', ','monty','was here','again');
concat_ws(', ','monty','was here','again')
monty, was here, again
select concat_ws(NULL,'a'),concat_ws(',',NULL,'');
concat_ws(NULL,'a')	concat_ws(',',NULL,'')
NULL	
select concat_ws(',','',NULL,'a');
concat_ws(',','',NULL,'a')
,a
SELECT CONCAT('"',CONCAT_WS('";"',repeat('a',60),repeat('b',60),repeat('c',60),repeat('d',100)), '"');
CONCAT('"',CONCAT_WS('";"',repeat('a',60),repeat('b',60),repeat('c',60),repeat('d',100)), '"')
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb";"cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc";"dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd"
select insert('txs',2,1,'hi'),insert('is ',4,0,'a'),insert('txxxxt',2,4,'es');
insert('txs',2,1,'hi')	insert('is ',4,0,'a')	insert('txxxxt',2,4,'es')
this	is a	test
select replace('aaaa','a','b'),replace('aaaa','aa','b'),replace('aaaa','a','bb'),replace('aaaa','','b'),replace('bbbb','a','c');
replace('aaaa','a','b')	replace('aaaa','aa','b')	replace('aaaa','a','bb')	replace('aaaa','','b')	replace('bbbb','a','c')
bbbb	bb	bbbbbbbb	aaaa	bbbb
select replace(concat(lcase(concat('THIS',' ','IS',' ','A',' ')),ucase('false'),' ','test'),'FALSE','REAL') ;
replace(concat(lcase(concat('THIS',' ','IS',' ','A',' ')),ucase('false'),' ','test'),'FALSE','REAL')
this is a REAL test
select soundex(''),soundex('he'),soundex('hello all folks'),soundex('#3556 in bugdb');
soundex('')	soundex('he')	soundex('hello all folks')	soundex('#3556 in bugdb')
	H000	H4142	I51231
select 'mood' sounds like 'mud';
'mood' sounds like 'mud'
1
select 'Glazgo' sounds like 'Liverpool';
'Glazgo' sounds like 'Liverpool'
0
select null sounds like 'null';
null sounds like 'null'
NULL
select 'null' sounds like null;
'null' sounds like null
NULL
select null sounds like null;
null sounds like null
NULL
select md5('hello');
md5('hello')
5d41402abc4b2a76b9719d911017c592
select crc32("123");
crc32("123")
2286445522
select sha('abc');
sha('abc')
a9993e364706816aba3e25717850c26c9cd0d89d
select sha1('abc');
sha1('abc')
a9993e364706816aba3e25717850c26c9cd0d89d
select aes_decrypt(aes_encrypt('abc','1'),'1');
aes_decrypt(aes_encrypt('abc','1'),'1')
abc
select aes_decrypt(aes_encrypt('abc','1'),1);
aes_decrypt(aes_encrypt('abc','1'),1)
abc
select aes_encrypt(NULL,"a");
aes_encrypt(NULL,"a")
NULL
select aes_encrypt("a",NULL);
aes_encrypt("a",NULL)
NULL
select aes_decrypt(NULL,"a");
aes_decrypt(NULL,"a")
NULL
select aes_decrypt("a",NULL);
aes_decrypt("a",NULL)
NULL
select aes_decrypt("a","a");
aes_decrypt("a","a")
NULL
select aes_decrypt(aes_encrypt("","a"),"a");
aes_decrypt(aes_encrypt("","a"),"a")

select repeat('monty',5),concat('*',space(5),'*');
repeat('monty',5)	concat('*',space(5),'*')
montymontymontymontymonty	*     *
select reverse('abc'),reverse('abcd');
reverse('abc')	reverse('abcd')
cba	dcba
select rpad('a',4,'1'),rpad('a',4,'12'),rpad('abcd',3,'12'), rpad(11, 10 , 22), rpad("ab", 10, 22);
rpad('a',4,'1')	rpad('a',4,'12')	rpad('abcd',3,'12')	rpad(11, 10 , 22)	rpad("ab", 10, 22)
a111	a121	abc	1122222222	ab22222222
select lpad('a',4,'1'),lpad('a',4,'12'),lpad('abcd',3,'12'), lpad(11, 10 , 22);
lpad('a',4,'1')	lpad('a',4,'12')	lpad('abcd',3,'12')	lpad(11, 10 , 22)
111a	121a	abc	2222222211
select rpad(741653838,17,'0'),lpad(741653838,17,'0');
rpad(741653838,17,'0')	lpad(741653838,17,'0')
74165383800000000	00000000741653838
select rpad('abcd',7,'ab'),lpad('abcd',7,'ab');
rpad('abcd',7,'ab')	lpad('abcd',7,'ab')
abcdaba	abaabcd
select rpad('abcd',1,'ab'),lpad('abcd',1,'ab');
rpad('abcd',1,'ab')	lpad('abcd',1,'ab')
a	a
select rpad('STRING', 20, CONCAT('p','a','d') );
rpad('STRING', 20, CONCAT('p','a','d') )
STRINGpadpadpadpadpa
select lpad('STRING', 20, CONCAT('p','a','d') );
lpad('STRING', 20, CONCAT('p','a','d') )
padpadpadpadpaSTRING
select LEAST(NULL,'HARRY','HARRIOT',NULL,'HAROLD'),GREATEST(NULL,'HARRY','HARRIOT',NULL,'HAROLD');
LEAST(NULL,'HARRY','HARRIOT',NULL,'HAROLD')	GREATEST(NULL,'HARRY','HARRIOT',NULL,'HAROLD')
HAROLD	HARRY
select least(1,2,3) | greatest(16,32,8), least(5,4)*1,greatest(-1.0,1.0)*1,least(3,2,1)*1.0,greatest(1,1.1,1.0),least("10",9),greatest("A","B","0");
least(1,2,3) | greatest(16,32,8)	least(5,4)*1	greatest(-1.0,1.0)*1	least(3,2,1)*1.0	greatest(1,1.1,1.0)	least("10",9)	greatest("A","B","0")
33	4	1.0	1.0	1.1	9	B
select decode(encode(repeat("a",100000),"monty"),"monty")=repeat("a",100000);
decode(encode(repeat("a",100000),"monty"),"monty")=repeat("a",100000)
1
select decode(encode("abcdef","monty"),"monty")="abcdef";
decode(encode("abcdef","monty"),"monty")="abcdef"
1
select quote('\'\"\\test');
quote('\'\"\\test')
'\'"\\test'
select quote(concat('abc\'', '\\cba'));
quote(concat('abc\'', '\\cba'))
'abc\'\\cba'
select quote(1/0), quote('\0\Z');
quote(1/0)	quote('\0\Z')
NULL	'\0\Z'
select length(quote(concat(char(0),"test")));
length(quote(concat(char(0),"test")))
8
select hex(quote(concat(char(224),char(227),char(230),char(231),char(232),char(234),char(235))));
hex(quote(concat(char(224),char(227),char(230),char(231),char(232),char(234),char(235))))
27E0E3E6E7E8EAEB27
select unhex(hex("foobar")), hex(unhex("1234567890ABCDEF")), unhex("345678"), unhex(NULL);
unhex(hex("foobar"))	hex(unhex("1234567890ABCDEF"))	unhex("345678")	unhex(NULL)
foobar	1234567890ABCDEF	4Vx	NULL
select hex(unhex("1")), hex(unhex("12")), hex(unhex("123")), hex(unhex("1234")), hex(unhex("12345")), hex(unhex("123456"));
hex(unhex("1"))	hex(unhex("12"))	hex(unhex("123"))	hex(unhex("1234"))	hex(unhex("12345"))	hex(unhex("123456"))
01	12	0123	1234	012345	123456
select length(unhex(md5("abrakadabra")));
length(unhex(md5("abrakadabra")))
16
select concat('a', quote(NULL));
concat('a', quote(NULL))
aNULL
select reverse("");
reverse("")

select insert("aa",100,1,"b"),insert("aa",1,3,"b"),left("aa",-1),substring("a",1,2);
insert("aa",100,1,"b")	insert("aa",1,3,"b")	left("aa",-1)	substring("a",1,2)
aa	b		a
select elt(2,1),field(NULL,"a","b","c"),reverse("");
elt(2,1)	field(NULL,"a","b","c")	reverse("")
NULL	0	
select locate("a","b",2),locate("","a",1);
locate("a","b",2)	locate("","a",1)
0	1
select ltrim("a"),rtrim("a"),trim(BOTH "" from "a"),trim(BOTH " " from "a");
ltrim("a")	rtrim("a")	trim(BOTH "" from "a")	trim(BOTH " " from "a")
a	a	a	a
select concat("1","2")|0,concat("1",".5")+0.0;
concat("1","2")|0	concat("1",".5")+0.0
12	1.5
select substring_index("www.tcx.se","",3);
substring_index("www.tcx.se","",3)

select length(repeat("a",100000000)),length(repeat("a",1000*64));
length(repeat("a",100000000))	length(repeat("a",1000*64))
NULL	64000
Warnings:
Warning	1301	Result of repeat() was larger than max_allowed_packet (1048576) - truncated
select position("0" in "baaa" in (1)),position("0" in "1" in (1,2,3)),position("sql" in ("mysql"));
position("0" in "baaa" in (1))	position("0" in "1" in (1,2,3))	position("sql" in ("mysql"))
1	0	3
select position(("1" in (1,2,3)) in "01");
position(("1" in (1,2,3)) in "01")
2
select length(repeat("a",65500)),length(concat(repeat("a",32000),repeat("a",32000))),length(replace("aaaaa","a",concat(repeat("a",10000)))),length(insert(repeat("a",40000),1,30000,repeat("b",50000)));
length(repeat("a",65500))	length(concat(repeat("a",32000),repeat("a",32000)))	length(replace("aaaaa","a",concat(repeat("a",10000))))	length(insert(repeat("a",40000),1,30000,repeat("b",50000)))
65500	64000	50000	60000
select length(repeat("a",1000000)),length(concat(repeat("a",32000),repeat("a",32000),repeat("a",32000))),length(replace("aaaaa","a",concat(repeat("a",32000)))),length(insert(repeat("a",48000),1,1000,repeat("a",48000)));
length(repeat("a",1000000))	length(concat(repeat("a",32000),repeat("a",32000),repeat("a",32000)))	length(replace("aaaaa","a",concat(repeat("a",32000))))	length(insert(repeat("a",48000),1,1000,repeat("a",48000)))
1000000	96000	160000	95000
create table t1 ( domain char(50) );
insert into t1 VALUES ("hello.de" ), ("test.de" );
select domain from t1 where concat('@', trim(leading '.' from concat('.', domain))) = '@hello.de';
domain
hello.de
select domain from t1 where concat('@', trim(leading '.' from concat('.', domain))) = '@test.de';
domain
test.de
drop table t1;
CREATE TABLE t1 (
id int(10) unsigned NOT NULL,
title varchar(255) default NULL,
prio int(10) unsigned default NULL,
category int(10) unsigned default NULL,
program int(10) unsigned default NULL,
bugdesc text,
created datetime default NULL,
modified timestamp(14) NOT NULL,
bugstatus int(10) unsigned default NULL,
submitter int(10) unsigned default NULL
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,'Link',1,1,1,'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa','2001-02-28 08:40:16',20010228084016,0,4);
SELECT CONCAT('"',CONCAT_WS('";"',title,prio,category,program,bugdesc,created,modified+0,bugstatus,submitter), '"') FROM t1;
CONCAT('"',CONCAT_WS('";"',title,prio,category,program,bugdesc,created,modified+0,bugstatus,submitter), '"')
"Link";"1";"1";"1";"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";"2001-02-28 08:40:16";"20010228084016";"0";"4"
SELECT CONCAT('"',CONCAT_WS('";"',title,prio,category,program,bugstatus,submitter), '"') FROM t1;
CONCAT('"',CONCAT_WS('";"',title,prio,category,program,bugstatus,submitter), '"')
"Link";"1";"1";"1";"0";"4"
SELECT CONCAT_WS('";"',title,prio,category,program,bugdesc,created,modified+0,bugstatus,submitter) FROM t1;
CONCAT_WS('";"',title,prio,category,program,bugdesc,created,modified+0,bugstatus,submitter)
Link";"1";"1";"1";"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";"2001-02-28 08:40:16";"20010228084016";"0";"4
SELECT bugdesc, REPLACE(bugdesc, 'xxxxxxxxxxxxxxxxxxxx', 'bbbbbbbbbbbbbbbbbbbb') from t1 group by bugdesc;
bugdesc	REPLACE(bugdesc, 'xxxxxxxxxxxxxxxxxxxx', 'bbbbbbbbbbbbbbbbbbbb')
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa	aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
drop table t1;
CREATE TABLE t1 (id int(11) NOT NULL auto_increment, tmp text NOT NULL, KEY id (id)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1, 'a545f661efdd1fb66fdee3aab79945bf');
SELECT 1 FROM t1 WHERE tmp=AES_DECRYPT(tmp,"password");
1
DROP TABLE t1;
CREATE TABLE t1 (
wid int(10) unsigned NOT NULL auto_increment,
data_podp date default NULL,
status_wnio enum('nowy','podp','real','arch') NOT NULL default 'nowy',
PRIMARY KEY(wid)
);
INSERT INTO t1 VALUES (8,NULL,'real');
INSERT INTO t1 VALUES (9,NULL,'nowy');
SELECT elt(status_wnio,data_podp) FROM t1 GROUP BY wid;
elt(status_wnio,data_podp)
NULL
NULL
DROP TABLE t1;
CREATE TABLE t1 (title text) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('Congress reconvenes in September to debate welfare and adult education');
INSERT INTO t1 VALUES ('House passes the CAREERS bill');
SELECT CONCAT("</a>",RPAD("",(55 - LENGTH(title)),".")) from t1;
CONCAT("</a>",RPAD("",(55 - LENGTH(title)),"."))
NULL
</a>..........................
DROP TABLE t1;
CREATE TABLE t1 (i int, j int);
INSERT INTO t1 VALUES (1,1),(2,2);
SELECT DISTINCT i, ELT(j, '345', '34') FROM t1;
i	ELT(j, '345', '34')
1	345
2	34
DROP TABLE t1;
create table t1(a char(4));
insert into t1 values ('one'),(NULL),('two'),('four');
select a, quote(a), isnull(quote(a)), quote(a) is null, ifnull(quote(a), 'n') from t1;
a	quote(a)	isnull(quote(a))	quote(a) is null	ifnull(quote(a), 'n')
one	'one'	0	0	'one'
NULL	NULL	0	0	NULL
two	'two'	0	0	'two'
four	'four'	0	0	'four'
drop table t1;
select trim(trailing 'foo' from 'foo');
trim(trailing 'foo' from 'foo')

select trim(leading 'foo' from 'foo');
trim(leading 'foo' from 'foo')

select quote(ltrim(concat('    ', 'a')));
quote(ltrim(concat('    ', 'a')))
'a'
select quote(trim(concat('    ', 'a')));
quote(trim(concat('    ', 'a')))
'a'
CREATE TABLE t1 SELECT 1 UNION SELECT 2 UNION SELECT 3;
SELECT QUOTE('A') FROM t1;
QUOTE('A')
'A'
'A'
'A'
DROP TABLE t1;
select 1=_latin1'1';
1=_latin1'1'
1
select _latin1'1'=1;
_latin1'1'=1
1
select _latin2'1'=1;
_latin2'1'=1
1
select 1=_latin2'1';
1=_latin2'1'
1
select _latin1'1'=_latin2'1';
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE) and (latin2_general_ci,COERCIBLE) for operation '='
select row('a','b','c') = row('a','b','c');
row('a','b','c') = row('a','b','c')
1
select row('A','b','c') = row('a','b','c');
row('A','b','c') = row('a','b','c')
1
select row('A' COLLATE latin1_bin,'b','c') = row('a','b','c');
row('A' COLLATE latin1_bin,'b','c') = row('a','b','c')
0
select row('A','b','c') = row('a' COLLATE latin1_bin,'b','c');
row('A','b','c') = row('a' COLLATE latin1_bin,'b','c')
0
select row('A' COLLATE latin1_general_ci,'b','c') = row('a' COLLATE latin1_bin,'b','c');
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT) and (latin1_bin,EXPLICIT) for operation '='
select concat(_latin1'a',_latin2'a');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE) and (latin2_general_ci,COERCIBLE) for operation 'concat'
select concat(_latin1'a',_latin2'a',_latin5'a');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE), (latin5_turkish_ci,COERCIBLE) for operation 'concat'
select concat(_latin1'a',_latin2'a',_latin5'a',_latin7'a');
ERROR HY000: Illegal mix of collations for operation 'concat'
select concat_ws(_latin1'a',_latin2'a');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE) and (latin2_general_ci,COERCIBLE) for operation 'concat_ws'
select FIELD('b','A','B');
FIELD('b','A','B')
2
select FIELD('B','A','B');
FIELD('B','A','B')
2
select FIELD('b' COLLATE latin1_bin,'A','B');
FIELD('b' COLLATE latin1_bin,'A','B')
0
select FIELD('b','A' COLLATE latin1_bin,'B');
FIELD('b','A' COLLATE latin1_bin,'B')
0
select FIELD(_latin2'b','A','B');
ERROR HY000: Illegal mix of collations (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation 'field'
select FIELD('b',_latin2'A','B');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation 'field'
select FIELD('b',_latin2'A','B',1);
FIELD('b',_latin2'A','B',1)
1
select POSITION(_latin1'B' IN _latin1'abcd');
POSITION(_latin1'B' IN _latin1'abcd')
2
select POSITION(_latin1'B' IN _latin1'abcd' COLLATE latin1_bin);
POSITION(_latin1'B' IN _latin1'abcd' COLLATE latin1_bin)
0
select POSITION(_latin1'B' COLLATE latin1_bin IN _latin1'abcd');
POSITION(_latin1'B' COLLATE latin1_bin IN _latin1'abcd')
0
select POSITION(_latin1'B' COLLATE latin1_general_ci IN _latin1'abcd' COLLATE latin1_bin);
ERROR HY000: Illegal mix of collations (latin1_bin,EXPLICIT) and (latin1_general_ci,EXPLICIT) for operation 'locate'
select POSITION(_latin1'B' IN _latin2'abcd');
ERROR HY000: Illegal mix of collations (latin2_general_ci,COERCIBLE) and (latin1_swedish_ci,COERCIBLE) for operation 'locate'
select FIND_IN_SET(_latin1'B',_latin1'a,b,c,d');
FIND_IN_SET(_latin1'B',_latin1'a,b,c,d')
2
select FIND_IN_SET(_latin1'B' COLLATE latin1_general_ci,_latin1'a,b,c,d' COLLATE latin1_bin);
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT) and (latin1_bin,EXPLICIT) for operation 'find_in_set'
select FIND_IN_SET(_latin1'B',_latin2'a,b,c,d');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE) and (latin2_general_ci,COERCIBLE) for operation 'find_in_set'
select SUBSTRING_INDEX(_latin1'abcdabcdabcd',_latin1'd',2);
SUBSTRING_INDEX(_latin1'abcdabcdabcd',_latin1'd',2)
abcdabc
select SUBSTRING_INDEX(_latin1'abcdabcdabcd',_latin2'd',2);
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE) and (latin2_general_ci,COERCIBLE) for operation 'substr_index'
select SUBSTRING_INDEX(_latin1'abcdabcdabcd' COLLATE latin1_general_ci,_latin1'd' COLLATE latin1_bin,2);
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT) and (latin1_bin,EXPLICIT) for operation 'substr_index'
select _latin1'B' between _latin1'a' and _latin1'c';
_latin1'B' between _latin1'a' and _latin1'c'
1
select _latin1'B' collate latin1_bin between _latin1'a' and _latin1'c';
_latin1'B' collate latin1_bin between _latin1'a' and _latin1'c'
0
select _latin1'B' between _latin1'a' collate latin1_bin and _latin1'c';
_latin1'B' between _latin1'a' collate latin1_bin and _latin1'c'
0
select _latin1'B' between _latin1'a' and _latin1'c' collate latin1_bin;
_latin1'B' between _latin1'a' and _latin1'c' collate latin1_bin
0
select _latin2'B' between _latin1'a' and _latin1'b';
ERROR HY000: Illegal mix of collations (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation 'between'
select _latin1'B' between _latin2'a' and _latin1'b';
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation 'between'
select _latin1'B' between _latin1'a' and _latin2'b';
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE) for operation 'between'
select _latin1'B' collate latin1_general_ci between _latin1'a' collate latin1_bin and _latin1'b';
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_bin,EXPLICIT), (latin1_swedish_ci,COERCIBLE) for operation 'between'
select _latin1'B' in (_latin1'a',_latin1'b');
_latin1'B' in (_latin1'a',_latin1'b')
1
select _latin1'B' collate latin1_bin in (_latin1'a',_latin1'b');
_latin1'B' collate latin1_bin in (_latin1'a',_latin1'b')
0
select _latin1'B' in (_latin1'a' collate latin1_bin,_latin1'b');
_latin1'B' in (_latin1'a' collate latin1_bin,_latin1'b')
0
select _latin1'B' in (_latin1'a',_latin1'b' collate latin1_bin);
_latin1'B' in (_latin1'a',_latin1'b' collate latin1_bin)
0
select _latin2'B' in (_latin1'a',_latin1'b');
ERROR HY000: Illegal mix of collations (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation ' IN '
select _latin1'B' in (_latin2'a',_latin1'b');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation ' IN '
select _latin1'B' in (_latin1'a',_latin2'b');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE) for operation ' IN '
select _latin1'B' COLLATE latin1_general_ci in (_latin1'a' COLLATE latin1_bin,_latin1'b');
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_bin,EXPLICIT), (latin1_swedish_ci,COERCIBLE) for operation ' IN '
select _latin1'B' COLLATE latin1_general_ci in (_latin1'a',_latin1'b' COLLATE latin1_bin);
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_swedish_ci,COERCIBLE), (latin1_bin,EXPLICIT) for operation ' IN '
select collation(bin(130)), coercibility(bin(130));
collation(bin(130))	coercibility(bin(130))
latin1_swedish_ci	4
select collation(oct(130)), coercibility(oct(130));
collation(oct(130))	coercibility(oct(130))
latin1_swedish_ci	4
select collation(conv(130,16,10)), coercibility(conv(130,16,10));
collation(conv(130,16,10))	coercibility(conv(130,16,10))
latin1_swedish_ci	4
select collation(hex(130)), coercibility(hex(130));
collation(hex(130))	coercibility(hex(130))
latin1_swedish_ci	4
select collation(char(130)), coercibility(hex(130));
collation(char(130))	coercibility(hex(130))
latin1_swedish_ci	4
select collation(format(130,10)), coercibility(format(130,10));
collation(format(130,10))	coercibility(format(130,10))
latin1_swedish_ci	4
select collation(lcase(_latin2'a')), coercibility(lcase(_latin2'a'));
collation(lcase(_latin2'a'))	coercibility(lcase(_latin2'a'))
latin2_general_ci	4
select collation(ucase(_latin2'a')), coercibility(ucase(_latin2'a'));
collation(ucase(_latin2'a'))	coercibility(ucase(_latin2'a'))
latin2_general_ci	4
select collation(left(_latin2'a',1)), coercibility(left(_latin2'a',1));
collation(left(_latin2'a',1))	coercibility(left(_latin2'a',1))
latin2_general_ci	4
select collation(right(_latin2'a',1)), coercibility(right(_latin2'a',1));
collation(right(_latin2'a',1))	coercibility(right(_latin2'a',1))
latin2_general_ci	4
select collation(substring(_latin2'a',1,1)), coercibility(substring(_latin2'a',1,1));
collation(substring(_latin2'a',1,1))	coercibility(substring(_latin2'a',1,1))
latin2_general_ci	4
select collation(concat(_latin2'a',_latin2'b')), coercibility(concat(_latin2'a',_latin2'b'));
collation(concat(_latin2'a',_latin2'b'))	coercibility(concat(_latin2'a',_latin2'b'))
latin2_general_ci	4
select collation(lpad(_latin2'a',4,_latin2'b')), coercibility(lpad(_latin2'a',4,_latin2'b'));
collation(lpad(_latin2'a',4,_latin2'b'))	coercibility(lpad(_latin2'a',4,_latin2'b'))
latin2_general_ci	4
select collation(rpad(_latin2'a',4,_latin2'b')), coercibility(rpad(_latin2'a',4,_latin2'b'));
collation(rpad(_latin2'a',4,_latin2'b'))	coercibility(rpad(_latin2'a',4,_latin2'b'))
latin2_general_ci	4
select collation(concat_ws(_latin2'a',_latin2'b')), coercibility(concat_ws(_latin2'a',_latin2'b'));
collation(concat_ws(_latin2'a',_latin2'b'))	coercibility(concat_ws(_latin2'a',_latin2'b'))
latin2_general_ci	4
select collation(make_set(255,_latin2'a',_latin2'b',_latin2'c')), coercibility(make_set(255,_latin2'a',_latin2'b',_latin2'c'));
collation(make_set(255,_latin2'a',_latin2'b',_latin2'c'))	coercibility(make_set(255,_latin2'a',_latin2'b',_latin2'c'))
latin2_general_ci	4
select collation(export_set(255,_latin2'y',_latin2'n',_latin2' ')), coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' '));
collation(export_set(255,_latin2'y',_latin2'n',_latin2' '))	coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' '))
latin2_general_ci	4
select collation(trim(_latin2' a ')), coercibility(trim(_latin2' a '));
collation(trim(_latin2' a '))	coercibility(trim(_latin2' a '))
latin2_general_ci	4
select collation(ltrim(_latin2' a ')), coercibility(ltrim(_latin2' a '));
collation(ltrim(_latin2' a '))	coercibility(ltrim(_latin2' a '))
latin2_general_ci	4
select collation(rtrim(_latin2' a ')), coercibility(rtrim(_latin2' a '));
collation(rtrim(_latin2' a '))	coercibility(rtrim(_latin2' a '))
latin2_general_ci	4
select collation(trim(LEADING _latin2' ' FROM _latin2'a')), coercibility(trim(LEADING _latin2'a' FROM _latin2'a'));
collation(trim(LEADING _latin2' ' FROM _latin2'a'))	coercibility(trim(LEADING _latin2'a' FROM _latin2'a'))
latin2_general_ci	4
select collation(trim(TRAILING _latin2' ' FROM _latin2'a')), coercibility(trim(TRAILING _latin2'a' FROM _latin2'a'));
collation(trim(TRAILING _latin2' ' FROM _latin2'a'))	coercibility(trim(TRAILING _latin2'a' FROM _latin2'a'))
latin2_general_ci	4
select collation(trim(BOTH _latin2' ' FROM _latin2'a')), coercibility(trim(BOTH _latin2'a' FROM _latin2'a'));
collation(trim(BOTH _latin2' ' FROM _latin2'a'))	coercibility(trim(BOTH _latin2'a' FROM _latin2'a'))
latin2_general_ci	4
select collation(repeat(_latin2'a',10)), coercibility(repeat(_latin2'a',10));
collation(repeat(_latin2'a',10))	coercibility(repeat(_latin2'a',10))
latin2_general_ci	4
select collation(reverse(_latin2'ab')), coercibility(reverse(_latin2'ab'));
collation(reverse(_latin2'ab'))	coercibility(reverse(_latin2'ab'))
latin2_general_ci	4
select collation(quote(_latin2'ab')), coercibility(quote(_latin2'ab'));
collation(quote(_latin2'ab'))	coercibility(quote(_latin2'ab'))
latin2_general_ci	4
select collation(soundex(_latin2'ab')), coercibility(soundex(_latin2'ab'));
collation(soundex(_latin2'ab'))	coercibility(soundex(_latin2'ab'))
latin2_general_ci	4
select collation(substring(_latin2'ab',1)), coercibility(substring(_latin2'ab',1));
collation(substring(_latin2'ab',1))	coercibility(substring(_latin2'ab',1))
latin2_general_ci	4
select collation(insert(_latin2'abcd',2,3,_latin2'ef')), coercibility(insert(_latin2'abcd',2,3,_latin2'ef'));
collation(insert(_latin2'abcd',2,3,_latin2'ef'))	coercibility(insert(_latin2'abcd',2,3,_latin2'ef'))
latin2_general_ci	4
select collation(replace(_latin2'abcd',_latin2'b',_latin2'B')), coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B'));
collation(replace(_latin2'abcd',_latin2'b',_latin2'B'))	coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B'))
latin2_general_ci	4
select collation(encode('abcd','ab')), coercibility(encode('abcd','ab'));
collation(encode('abcd','ab'))	coercibility(encode('abcd','ab'))
binary	4
create table t1 
select
bin(130),
oct(130),
conv(130,16,10),
hex(130),
char(130),
format(130,10),
left(_latin2'a',1),
right(_latin2'a',1), 
lcase(_latin2'a'), 
ucase(_latin2'a'),
substring(_latin2'a',1,1),
concat(_latin2'a',_latin2'b'),
lpad(_latin2'a',4,_latin2'b'),
rpad(_latin2'a',4,_latin2'b'),
concat_ws(_latin2'a',_latin2'b'),
make_set(255,_latin2'a',_latin2'b',_latin2'c'),
export_set(255,_latin2'y',_latin2'n',_latin2' '),
trim(_latin2' a '),
ltrim(_latin2' a '),
rtrim(_latin2' a '),
trim(LEADING _latin2' ' FROM _latin2' a '),
trim(TRAILING _latin2' ' FROM _latin2' a '),
trim(BOTH _latin2' ' FROM _latin2' a '),
repeat(_latin2'a',10),
reverse(_latin2'ab'),
quote(_latin2'ab'),
soundex(_latin2'ab'),
substring(_latin2'ab',1),
insert(_latin2'abcd',2,3,_latin2'ef'),
replace(_latin2'abcd',_latin2'b',_latin2'B'),
encode('abcd','ab')
;
Warnings:
Warning	1265	Data truncated for column 'format(130,10)' at row 1
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `bin(130)` char(64) NOT NULL default '',
  `oct(130)` char(64) NOT NULL default '',
  `conv(130,16,10)` char(64) NOT NULL default '',
  `hex(130)` char(6) NOT NULL default '',
  `char(130)` char(1) NOT NULL default '',
  `format(130,10)` char(4) NOT NULL default '',
  `left(_latin2'a',1)` char(1) character set latin2 NOT NULL default '',
  `right(_latin2'a',1)` char(1) character set latin2 NOT NULL default '',
  `lcase(_latin2'a')` char(1) character set latin2 NOT NULL default '',
  `ucase(_latin2'a')` char(1) character set latin2 NOT NULL default '',
  `substring(_latin2'a',1,1)` char(1) character set latin2 NOT NULL default '',
  `concat(_latin2'a',_latin2'b')` char(2) character set latin2 NOT NULL default '',
  `lpad(_latin2'a',4,_latin2'b')` char(4) character set latin2 NOT NULL default '',
  `rpad(_latin2'a',4,_latin2'b')` char(4) character set latin2 NOT NULL default '',
  `concat_ws(_latin2'a',_latin2'b')` char(1) character set latin2 NOT NULL default '',
  `make_set(255,_latin2'a',_latin2'b',_latin2'c')` char(5) character set latin2 NOT NULL default '',
  `export_set(255,_latin2'y',_latin2'n',_latin2' ')` char(127) character set latin2 NOT NULL default '',
  `trim(_latin2' a ')` char(3) character set latin2 NOT NULL default '',
  `ltrim(_latin2' a ')` char(3) character set latin2 NOT NULL default '',
  `rtrim(_latin2' a ')` char(3) character set latin2 NOT NULL default '',
  `trim(LEADING _latin2' ' FROM _latin2' a ')` char(3) character set latin2 NOT NULL default '',
  `trim(TRAILING _latin2' ' FROM _latin2' a ')` char(3) character set latin2 NOT NULL default '',
  `trim(BOTH _latin2' ' FROM _latin2' a ')` char(3) character set latin2 NOT NULL default '',
  `repeat(_latin2'a',10)` char(10) character set latin2 NOT NULL default '',
  `reverse(_latin2'ab')` char(2) character set latin2 NOT NULL default '',
  `quote(_latin2'ab')` char(6) character set latin2 NOT NULL default '',
  `soundex(_latin2'ab')` char(4) character set latin2 NOT NULL default '',
  `substring(_latin2'ab',1)` char(2) character set latin2 NOT NULL default '',
  `insert(_latin2'abcd',2,3,_latin2'ef')` char(6) character set latin2 NOT NULL default '',
  `replace(_latin2'abcd',_latin2'b',_latin2'B')` char(4) character set latin2 NOT NULL default '',
  `encode('abcd','ab')` binary(4) NOT NULL default ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 (a char character set latin2);
insert into t1 values (null);
select charset(a), collation(a), coercibility(a) from t1;
charset(a)	collation(a)	coercibility(a)
latin2	latin2_general_ci	2
drop table t1;
select charset(null), collation(null), coercibility(null);
charset(null)	collation(null)	coercibility(null)
binary	binary	5
CREATE TABLE t1 (a int, b int);
CREATE TABLE t2 (a int, b int);
INSERT INTO t1 VALUES (1,1),(2,2);
INSERT INTO t2 VALUES (2,2),(3,3);
select t1.*,t2.* from t1 left join t2 on (t1.b=t2.b)
where collation(t2.a) = _utf8'binary' order by t1.a,t2.a;
a	b	a	b
1	1	NULL	NULL
2	2	2	2
select t1.*,t2.* from t1 left join t2 on (t1.b=t2.b)
where charset(t2.a) = _utf8'binary' order by t1.a,t2.a;
a	b	a	b
1	1	NULL	NULL
2	2	2	2
select t1.*,t2.* from t1 left join t2 on (t1.b=t2.b)
where coercibility(t2.a) = 2 order by t1.a,t2.a;
a	b	a	b
1	1	NULL	NULL
2	2	2	2
DROP TABLE t1, t2;
select SUBSTR('abcdefg',3,2);
SUBSTR('abcdefg',3,2)
cd
select SUBSTRING('abcdefg',3,2);
SUBSTRING('abcdefg',3,2)
cd
select SUBSTR('abcdefg',-3,2) FROM DUAL;
SUBSTR('abcdefg',-3,2)
ef
select SUBSTR('abcdefg',-1,5) FROM DUAL;
SUBSTR('abcdefg',-1,5)
g
select SUBSTR('abcdefg',0,0) FROM DUAL;
SUBSTR('abcdefg',0,0)

select SUBSTR('abcdefg',-1,-1) FROM DUAL;
SUBSTR('abcdefg',-1,-1)

select SUBSTR('abcdefg',1,-1) FROM DUAL;
SUBSTR('abcdefg',1,-1)

create table t7 (s1 char);
select * from t7
where concat(s1 collate latin1_general_ci,s1 collate latin1_swedish_ci) = 'AA';
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT) and (latin1_swedish_ci,EXPLICIT) for operation 'concat'
drop table t7;
select substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2),substring_index("1abcd;2abcd;3abcd;4abcd", ';', -2);
substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2)	substring_index("1abcd;2abcd;3abcd;4abcd", ';', -2)
1abcd;2abcd	3abcd;4abcd
explain extended select md5('hello'), sha('abc'), sha1('abc'), soundex(''), 'mood' sounds like 'mud', aes_decrypt(aes_encrypt('abc','1'),'1'),concat('*',space(5),'*'), reverse('abc'), rpad('a',4,'1'), lpad('a',4,'1'),  concat_ws(',','',NULL,'a'),make_set(255,_latin2'a',_latin2'b',_latin2'c'),elt(2,1),locate("a","b",2),format(130,10),char(0),conv(130,16,10),hex(130),binary 'HE', export_set(255,_latin2'y',_latin2'n',_latin2' '),FIELD('b' COLLATE latin1_bin,'A','B'),FIND_IN_SET(_latin1'B',_latin1'a,b,c,d'),collation(conv(130,16,10)), coercibility(conv(130,16,10)),length('\n\t\r\b\0\_\%\\'),bit_length('\n\t\r\b\0\_\%\\'),bit_length('\n\t\r\b\0\_\%\\'),concat('monty',' was here ','again'),length('hello'),char(ascii('h')),ord('h'),quote(1/0),crc32("123"),replace('aaaa','a','b'),insert('txs',2,1,'hi'),left(_latin2'a',1),right(_latin2'a',1),lcase(_latin2'a'),ucase(_latin2'a'),SUBSTR('abcdefg',3,2),substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2),trim(_latin2' a '),ltrim(_latin2' a '),rtrim(_latin2' a '), decode(encode(repeat("a",100000),"monty"),"monty");
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1003	select md5(_latin1'hello') AS `md5('hello')`,sha(_latin1'abc') AS `sha('abc')`,sha(_latin1'abc') AS `sha1('abc')`,soundex(_latin1'') AS `soundex('')`,(soundex(_latin1'mood') = soundex(_latin1'mud')) AS `'mood' sounds like 'mud'`,aes_decrypt(aes_encrypt(_latin1'abc',_latin1'1'),_latin1'1') AS `aes_decrypt(aes_encrypt('abc','1'),'1')`,concat(_latin1'*',repeat(_latin1' ',5),_latin1'*') AS `concat('*',space(5),'*')`,reverse(_latin1'abc') AS `reverse('abc')`,rpad(_latin1'a',4,_latin1'1') AS `rpad('a',4,'1')`,lpad(_latin1'a',4,_latin1'1') AS `lpad('a',4,'1')`,concat_ws(_latin1',',_latin1'',NULL,_latin1'a') AS `concat_ws(',','',NULL,'a')`,make_set(255,_latin2'a',_latin2'b',_latin2'c') AS `make_set(255,_latin2'a',_latin2'b',_latin2'c')`,elt(2,1) AS `elt(2,1)`,locate(_latin1'a',_latin1'b',2) AS `locate("a","b",2)`,format(130,10) AS `format(130,10)`,char(0) AS `char(0)`,conv(130,16,10) AS `conv(130,16,10)`,hex(130) AS `hex(130)`,cast(_latin1'HE' as char charset binary) AS `binary 'HE'`,export_set(255,_latin2'y',_latin2'n',_latin2' ') AS `export_set(255,_latin2'y',_latin2'n',_latin2' ')`,field((_latin1'b' collate _latin1'latin1_bin'),_latin1'A',_latin1'B') AS `FIELD('b' COLLATE latin1_bin,'A','B')`,find_in_set(_latin1'B',_latin1'a,b,c,d') AS `FIND_IN_SET(_latin1'B',_latin1'a,b,c,d')`,collation(conv(130,16,10)) AS `collation(conv(130,16,10))`,coercibility(conv(130,16,10)) AS `coercibility(conv(130,16,10))`,length(_latin1'\n	\r\0\\_\\%\\') AS `length('\n\t\r\b\0\_\%\\')`,bit_length(_latin1'\n	\r\0\\_\\%\\') AS `bit_length('\n\t\r\b\0\_\%\\')`,bit_length(_latin1'\n	\r\0\\_\\%\\') AS `bit_length('\n\t\r\b\0\_\%\\')`,concat(_latin1'monty',_latin1' was here ',_latin1'again') AS `concat('monty',' was here ','again')`,length(_latin1'hello') AS `length('hello')`,char(ascii(_latin1'h')) AS `char(ascii('h'))`,ord(_latin1'h') AS `ord('h')`,quote((1 / 0)) AS `quote(1/0)`,crc32(_latin1'123') AS `crc32("123")`,replace(_latin1'aaaa',_latin1'a',_latin1'b') AS `replace('aaaa','a','b')`,insert(_latin1'txs',2,1,_latin1'hi') AS `insert('txs',2,1,'hi')`,left(_latin2'a',1) AS `left(_latin2'a',1)`,right(_latin2'a',1) AS `right(_latin2'a',1)`,lcase(_latin2'a') AS `lcase(_latin2'a')`,ucase(_latin2'a') AS `ucase(_latin2'a')`,substr(_latin1'abcdefg',3,2) AS `SUBSTR('abcdefg',3,2)`,substr_index(_latin1'1abcd;2abcd;3abcd;4abcd',_latin1';',2) AS `substring_index("1abcd;2abcd;3abcd;4abcd", ';', 2)`,trim(_latin2' a ') AS `trim(_latin2' a ')`,ltrim(_latin2' a ') AS `ltrim(_latin2' a ')`,rtrim(_latin2' a ') AS `rtrim(_latin2' a ')`,decode(encode(repeat(_latin1'a',100000))) AS `decode(encode(repeat("a",100000),"monty"),"monty")`
SELECT lpad(12345, 5, "#");
lpad(12345, 5, "#")
12345
SELECT conv(71, 10, 36), conv('1Z', 36, 10);
conv(71, 10, 36)	conv('1Z', 36, 10)
1Z	71
create table t1 (id int(1), str varchar(10)) DEFAULT CHARSET=utf8;
insert into t1 values (1,'aaaaaaaaaa'), (2,'bbbbbbbbbb');
create table t2 (id int(1), str varchar(10)) DEFAULT CHARSET=utf8;
insert into t2 values (1,'cccccccccc'), (2,'dddddddddd');
select substring(concat(t1.str, t2.str), 1, 15) "name" from t1, t2 
where t2.id=t1.id order by name;
name
aaaaaaaaaaccccc
bbbbbbbbbbddddd
drop table t1, t2;
create table t1 (c1 INT, c2 INT UNSIGNED);
insert into t1 values ('21474836461','21474836461');
Warnings:
Warning	1265	Data truncated for column 'c1' at row 1
Warning	1265	Data truncated for column 'c2' at row 1
insert into t1 values ('-21474836461','-21474836461');
Warnings:
Warning	1265	Data truncated for column 'c1' at row 1
Warning	1265	Data truncated for column 'c2' at row 1
show warnings;
Level	Code	Message
Warning	1265	Data truncated for column 'c1' at row 1
Warning	1265	Data truncated for column 'c2' at row 1
select * from t1;
c1	c2
2147483647	4294967295
-2147483648	0
drop table t1;
select left(1234, 3) + 0;
left(1234, 3) + 0
123
create table t1 (a int not null primary key, b varchar(40), c datetime);
insert into t1 (a,b,c) values (1,'Tom','2004-12-10 12:13:14'),(2,'ball games','2004-12-10 12:13:14'), (3,'Basil','2004-12-10 12:13:14'), (4,'Dean','2004-12-10 12:13:14'),(5,'Ellis','2004-12-10 12:13:14'), (6,'Serg','2004-12-10 12:13:14'), (7,'Sergei','2004-12-10 12:13:14'),(8,'Georg','2004-12-10 12:13:14'),(9,'Salle','2004-12-10 12:13:14'),(10,'Sinisa','2004-12-10 12:13:14');
select count(*) as total, left(c,10) as reg from t1 group by reg order by reg desc limit 0,12;
total	reg
10	2004-12-10
drop table t1;
select trim(null from 'kate') as "must_be_null";
must_be_null
NULL
select trim('xyz' from null) as "must_be_null";
must_be_null
NULL
CREATE TABLE t1 (
id int(11) NOT NULL auto_increment,
a bigint(20) unsigned default NULL,
PRIMARY KEY  (id)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES
('0','16307858876001849059');
SELECT CONV('e251273eb74a8ee3', 16, 10);
CONV('e251273eb74a8ee3', 16, 10)
16307858876001849059
EXPLAIN 
SELECT id
FROM t1
WHERE a = 16307858876001849059;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	1	
EXPLAIN 
SELECT id
FROM t1
WHERE a = CONV('e251273eb74a8ee3', 16, 10);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	1	
DROP TABLE t1;
SELECT CHAR(NULL,121,83,81,'76') as my_column;
my_column
ySQL
SELECT CHAR_LENGTH(CHAR(NULL,121,83,81,'76')) as my_column;
my_column
4
CREATE TABLE t1 (id int PRIMARY KEY, str char(255) NOT NULL);
CREATE TABLE t2 (id int NOT NULL UNIQUE);
INSERT INTO t2 VALUES (1),(2);
INSERT INTO t1 VALUES (1, aes_encrypt('foo', 'bar'));
INSERT INTO t1 VALUES (2, 'not valid');
SELECT t1.id, aes_decrypt(str, 'bar') FROM t1, t2 WHERE t1.id = t2.id;
id	aes_decrypt(str, 'bar')
1	foo
2	NULL
SELECT t1.id, aes_decrypt(str, 'bar') FROM t1, t2 WHERE t1.id = t2.id
ORDER BY t1.id;
id	aes_decrypt(str, 'bar')
1	foo
2	NULL
DROP TABLE t1, t2;
select field(0,NULL,1,0), field("",NULL,"bar",""), field(0.0,NULL,1.0,0.0);
field(0,NULL,1,0)	field("",NULL,"bar","")	field(0.0,NULL,1.0,0.0)
3	3	3
select field(NULL,1,2,NULL), field(NULL,1,2,0);
field(NULL,1,2,NULL)	field(NULL,1,2,0)
0	0
CREATE TABLE t1 (str varchar(20) PRIMARY KEY);
CREATE TABLE t2 (num int primary key);
INSERT INTO t1 VALUES ('notnumber');
INSERT INTO t2 VALUES (0), (1);
SELECT * FROM t1, t2 WHERE num=str;
str	num
notnumber	0
SELECT * FROM t1, t2 WHERE num=substring(str from 1 for 6);
str	num
notnumber	0
DROP TABLE t1,t2;
CREATE TABLE t1(
id int(11) NOT NULL auto_increment,
pc int(11) NOT NULL default '0',
title varchar(20) default NULL,
PRIMARY KEY (id)
);
INSERT INTO t1 VALUES
(1, 0, 'Main'),
(2, 1, 'Toys'),
(3, 1, 'Games');
SELECT t1.id, CONCAT_WS('->', t3.title, t2.title, t1.title) as col1
FROM t1 LEFT JOIN t1 AS t2 ON t1.pc=t2.id
LEFT JOIN t1 AS t3 ON t2.pc=t3.id;
id	col1
1	Main
2	Main->Toys
3	Main->Games
SELECT t1.id, CONCAT_WS('->', t3.title, t2.title, t1.title) as col1
FROM t1 LEFT JOIN t1 AS t2 ON t1.pc=t2.id
LEFT JOIN t1 AS t3 ON t2.pc=t3.id
WHERE CONCAT_WS('->', t3.title, t2.title, t1.title) LIKE '%Toys%';
id	col1
2	Main->Toys
DROP TABLE t1;
CREATE TABLE t1(
trackid     int(10) unsigned NOT NULL auto_increment,
trackname   varchar(100) NOT NULL default '',
PRIMARY KEY (trackid)
);
CREATE TABLE t2(
artistid    int(10) unsigned NOT NULL auto_increment,
artistname  varchar(100) NOT NULL default '',
PRIMARY KEY (artistid)
);
CREATE TABLE t3(
trackid     int(10) unsigned NOT NULL,
artistid    int(10) unsigned NOT NULL,
PRIMARY KEY (trackid,artistid)
);
INSERT INTO t1 VALUES (1, 'April In Paris'), (2, 'Autumn In New York');
INSERT INTO t2 VALUES (1, 'Vernon Duke');
INSERT INTO t3 VALUES (1,1);
SELECT CONCAT_WS(' ', trackname, artistname) trackname, artistname
FROM t1 LEFT JOIN t3 ON t1.trackid=t3.trackid
LEFT JOIN t2 ON t2.artistid=t3.artistid
WHERE CONCAT_WS(' ', trackname, artistname) LIKE '%In%';
trackname	artistname
April In Paris Vernon Duke	Vernon Duke
Autumn In New York	NULL
DROP TABLE t1,t2,t3;
create table t1 (b varchar(5));
insert t1 values ('ab'), ('abc'), ('abcd'), ('abcde');
select *,substring(b,1),substring(b,-1),substring(b,-2),substring(b,-3),substring(b,-4),substring(b,-5) from t1;
b	substring(b,1)	substring(b,-1)	substring(b,-2)	substring(b,-3)	substring(b,-4)	substring(b,-5)
ab	ab	b	ab			
abc	abc	c	bc	abc		
abcd	abcd	d	cd	bcd	abcd	
abcde	abcde	e	de	cde	bcde	abcde
select * from (select *,substring(b,1),substring(b,-1),substring(b,-2),substring(b,-3),substring(b,-4),substring(b,-5) from t1) t;
b	substring(b,1)	substring(b,-1)	substring(b,-2)	substring(b,-3)	substring(b,-4)	substring(b,-5)
ab	ab	b	ab			
abc	abc	c	bc	abc		
abcd	abcd	d	cd	bcd	abcd	
abcde	abcde	e	de	cde	bcde	abcde
drop table t1;
select hex(29223372036854775809), hex(-29223372036854775809);
hex(29223372036854775809)	hex(-29223372036854775809)
FFFFFFFFFFFFFFFF	FFFFFFFFFFFFFFFF
create table t1 (i int);
insert into t1 values (1000000000),(1);
select lpad(i, 7, ' ') as t from t1;
Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
def					t	253	7	7	Y	128	31	63
t
1000000
      1
select rpad(i, 7, ' ') as t from t1;
Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
def					t	253	7	7	Y	128	31	63
t
1000000
1      
drop table t1;
