id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Name,Population 35,4 NULL 9 Using sort_intersect(Name,Population); Using where
1 SIMPLE City index_merge Population,Name Name,Population 35,4 NULL 9 Using sort_intersect(Name,Population); Using where
EXPLAIN
SELECT * FROM City WHERE
Name LIKE 'M%' AND Population > 1500000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Population,Name 4,35 NULL 5 Using sort_intersect(Population,Name); Using where
1 SIMPLE City index_merge Population,Name Population,Name 4,35 NULL 5 Using sort_intersect(Population,Name); Using where
EXPLAIN
SELECT * FROM City
WHERE Name LIKE 'M%' AND Population > 300000;
...
...
@@ -361,12 +361,12 @@ EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'M' AND 'N' AND Population > 1000000 AND Country LIKE 'C%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Name,Population 35,4 NULL 9 Using sort_intersect(Name,Population); Using where
1 SIMPLE City index_merge Population,Country,Name Name,Population 35,4 NULL 9 Using sort_intersect(Name,Population); Using where
EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'G' AND 'J' AND Population > 1000000 AND Country LIKE 'B%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Population,Country 4,3 NULL 19 Using sort_intersect(Population,Country); Using where
1 SIMPLE City index_merge Population,Country,Name Population,Country 4,3 NULL 19 Using sort_intersect(Population,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'G' AND 'K' AND Population > 500000 AND Country LIKE 'C%';
...
...
@@ -467,7 +467,7 @@ EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 1 AND 500 AND Population > 1000000 AND Country LIKE 'A%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country Country,Population 3,4 NULL 6 Using sort_intersect(Country,Population); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country Country,Population 3,4 NULL 6 Using sort_intersect(Country,Population); Using where
EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 2001 AND 2500 AND Population > 300000 AND Country LIKE 'H%';
...
...
@@ -478,7 +478,7 @@ SELECT * FROM City
WHERE ID BETWEEN 3701 AND 4000 AND Population > 1000000
AND Country BETWEEN 'S' AND 'Z';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country Population,PRIMARY 4,4 NULL 17 Using sort_intersect(Population,PRIMARY); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country Population,PRIMARY 4,4 NULL 17 Using sort_intersect(Population,PRIMARY); Using where
EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 3001 AND 4000 AND Population > 600000
...
...
@@ -718,17 +718,17 @@ EXPLAIN
SELECT * FROM City WHERE
Name LIKE 'C%' AND Population > 1000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Name,Population 35,4 NULL 9 Using sort_intersect(Name,Population); Using where
1 SIMPLE City index_merge Population,Name Name,Population 35,4 NULL 9 Using sort_intersect(Name,Population); Using where
EXPLAIN
SELECT * FROM City WHERE
Name LIKE 'M%' AND Population > 1500000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Population,Name 4,35 NULL 5 Using sort_intersect(Population,Name); Using where
1 SIMPLE City index_merge Population,Name Population,Name 4,35 NULL 5 Using sort_intersect(Population,Name); Using where
EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'G' AND 'J' AND Population > 1000000 AND Country LIKE 'B%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Population,Country 4,3 NULL 19 Using sort_intersect(Population,Country); Using where
1 SIMPLE City index_merge Population,Country,Name Population,Country 4,3 NULL 19 Using sort_intersect(Population,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'G' AND 'J' AND Population > 500000 AND Country LIKE 'C%';
...
...
@@ -738,7 +738,7 @@ EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 1 AND 500 AND Population > 1000000 AND Country LIKE 'A%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country Country,Population 3,4 NULL 6 Using sort_intersect(Country,Population); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country Country,Population 3,4 NULL 6 Using sort_intersect(Country,Population); Using where
EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 3001 AND 4000 AND Population > 600000
...
...
@@ -885,17 +885,17 @@ EXPLAIN
SELECT * FROM City
WHERE Country LIKE 'M%' AND Population > 1000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,CountryID,CountryName Population,CountryID 4,3 NULL 15 Using sort_intersect(Population,CountryID); Using where
1 SIMPLE City index_merge Population,CountryID,CountryName Population,CountryID 4,3 NULL 15 Using sort_intersect(Population,CountryID); Using where
EXPLAIN
SELECT * FROM City
WHERE Country='CHN' AND Population > 1500000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,CountryID,CountryName Population,CountryID 4,3 NULL 11 Using sort_intersect(Population,CountryID); Using where
1 SIMPLE City index_merge Population,CountryID,CountryName Population,CountryID 4,3 NULL 11 Using sort_intersect(Population,CountryID); Using where
EXPLAIN
SELECT * FROM City
WHERE Country='CHN' AND Population > 1500000 AND Name LIKE 'C%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name,CountryID,CountryName CountryName,Population 38,4 NULL 1 Using sort_intersect(CountryName,Population); Using where
1 SIMPLE City index_merge Population,Name,CountryID,CountryName CountryName,Population 38,4 NULL 1 Using sort_intersect(CountryName,Population); Using where
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Population,Name 4,35 NULL 16 Using sort_intersect(Population,Name); Using where
1 SIMPLE City index_merge Population,Name Population,Name 4,35 NULL 16 Using sort_intersect(Population,Name); Using where
EXPLAIN
SELECT * FROM City WHERE
Name LIKE 'M%' AND Population > 1500000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Population,Name 4,35 NULL 9 Using sort_intersect(Population,Name); Using where
1 SIMPLE City index_merge Population,Name Population,Name 4,35 NULL 9 Using sort_intersect(Population,Name); Using where
EXPLAIN
SELECT * FROM City
WHERE Name LIKE 'M%' AND Population > 300000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Name,Population 35,4 NULL 79 Using sort_intersect(Name,Population); Using where
1 SIMPLE City index_merge Population,Name Name,Population 35,4 NULL 79 Using sort_intersect(Name,Population); Using where
EXPLAIN
SELECT * FROM City
WHERE Name LIKE 'M%' AND Population > 7000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Population,Name 4,35 NULL 1 Using sort_intersect(Population,Name); Using where
1 SIMPLE City index_merge Population,Name Population,Name 4,35 NULL 1 Using sort_intersect(Population,Name); Using where
SELECT * FROM City USE INDEX ()
WHERE Name LIKE 'C%' AND Population > 1000000;
ID Name Country Population
...
...
@@ -362,17 +362,17 @@ EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'M' AND 'N' AND Population > 1000000 AND Country LIKE 'C%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Population,Name,Country 4,35,3 NULL 2 Using sort_intersect(Population,Name,Country); Using where
1 SIMPLE City index_merge Population,Country,Name Population,Name,Country 4,35,3 NULL 2 Using sort_intersect(Population,Name,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'G' AND 'J' AND Population > 1000000 AND Country LIKE 'B%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Population,Country,Name 4,3,35 NULL 2 Using sort_intersect(Population,Country,Name); Using where
1 SIMPLE City index_merge Population,Country,Name Population,Country,Name 4,3,35 NULL 2 Using sort_intersect(Population,Country,Name); Using where
EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'G' AND 'K' AND Population > 500000 AND Country LIKE 'C%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Population,Name,Country 4,35,3 NULL 26 Using sort_intersect(Population,Name,Country); Using where
1 SIMPLE City index_merge Population,Country,Name Population,Name,Country 4,35,3 NULL 26 Using sort_intersect(Population,Name,Country); Using where
SELECT * FROM City USE INDEX ()
WHERE Name BETWEEN 'M' AND 'N' AND Population > 1000000 AND Country LIKE 'C%';
ID Name Country Population
...
...
@@ -463,29 +463,29 @@ EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 501 AND 1000 AND Population > 700000 AND Country LIKE 'C%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country PRIMARY,Country,Population 4,3,4 NULL 11 Using sort_intersect(PRIMARY,Country,Population); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country PRIMARY,Country,Population 4,3,4 NULL 11 Using sort_intersect(PRIMARY,Country,Population); Using where
EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 1 AND 500 AND Population > 1000000 AND Country LIKE 'A%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country PRIMARY,Population,Country 4,4,3 NULL 1 Using sort_intersect(PRIMARY,Population,Country); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country PRIMARY,Population,Country 4,4,3 NULL 1 Using sort_intersect(PRIMARY,Population,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 2001 AND 2500 AND Population > 300000 AND Country LIKE 'H%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country PRIMARY,Country 4,3 NULL 7 Using sort_intersect(PRIMARY,Country); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country PRIMARY,Country 4,3 NULL 7 Using sort_intersect(PRIMARY,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 3701 AND 4000 AND Population > 1000000
AND Country BETWEEN 'S' AND 'Z';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country PRIMARY,Country,Population 4,3,4 NULL 2 Using sort_intersect(PRIMARY,Country,Population); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country PRIMARY,Country,Population 4,3,4 NULL 2 Using sort_intersect(PRIMARY,Country,Population); Using where
EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 3001 AND 4000 AND Population > 600000
AND Country BETWEEN 'S' AND 'Z' ;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country PRIMARY,Population,Country 4,4,3 NULL 30 Using sort_intersect(PRIMARY,Population,Country); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country PRIMARY,Population,Country 4,4,3 NULL 30 Using sort_intersect(PRIMARY,Population,Country); Using where
SELECT * FROM City USE INDEX ()
WHERE ID BETWEEN 501 AND 1000 AND Population > 700000 AND Country LIKE 'C%';
ID Name Country Population
...
...
@@ -719,33 +719,33 @@ EXPLAIN
SELECT * FROM City WHERE
Name LIKE 'C%' AND Population > 1000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Population,Name 4,35 NULL 16 Using sort_intersect(Population,Name); Using where
1 SIMPLE City index_merge Population,Name Population,Name 4,35 NULL 16 Using sort_intersect(Population,Name); Using where
EXPLAIN
SELECT * FROM City WHERE
Name LIKE 'M%' AND Population > 1500000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Population,Name 4,35 NULL 9 Using sort_intersect(Population,Name); Using where
1 SIMPLE City index_merge Population,Name Population,Name 4,35 NULL 9 Using sort_intersect(Population,Name); Using where
EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'G' AND 'J' AND Population > 1000000 AND Country LIKE 'B%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Population,Country,Name 4,3,35 NULL 2 Using sort_intersect(Population,Country,Name); Using where
1 SIMPLE City index_merge Population,Country,Name Population,Country,Name 4,3,35 NULL 2 Using sort_intersect(Population,Country,Name); Using where
EXPLAIN
SELECT * FROM City
WHERE Name BETWEEN 'G' AND 'J' AND Population > 500000 AND Country LIKE 'C%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Name,Population,Country 35,4,3 NULL 7 Using sort_intersect(Name,Population,Country); Using where
1 SIMPLE City index_merge Population,Country,Name Name,Population,Country 35,4,3 NULL 7 Using sort_intersect(Name,Population,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 1 AND 500 AND Population > 1000000 AND Country LIKE 'A%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country PRIMARY,Population,Country 4,4,3 NULL 1 Using sort_intersect(PRIMARY,Population,Country); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country PRIMARY,Population,Country 4,4,3 NULL 1 Using sort_intersect(PRIMARY,Population,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE ID BETWEEN 3001 AND 4000 AND Population > 600000
AND Country BETWEEN 'S' AND 'Z';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country PRIMARY,Country,Population 4,3,4 NULL 30 Using sort_intersect(PRIMARY,Country,Population); Using where
1 SIMPLE City index_merge PRIMARY,Population,Country PRIMARY,Country,Population 4,3,4 NULL 30 Using sort_intersect(PRIMARY,Country,Population); Using where
SELECT * FROM City WHERE
Name LIKE 'C%' AND Population > 1000000;
ID Name Country Population
...
...
@@ -886,17 +886,17 @@ EXPLAIN
SELECT * FROM City
WHERE Country LIKE 'M%' AND Population > 1000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,CountryID,CountryName Population,CountryID 4,3 NULL 16 Using sort_intersect(Population,CountryID); Using where
1 SIMPLE City index_merge Population,CountryID,CountryName Population,CountryID 4,3 NULL 16 Using sort_intersect(Population,CountryID); Using where
EXPLAIN
SELECT * FROM City
WHERE Country='CHN' AND Population > 1500000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,CountryID,CountryName Population,CountryID 4,3 NULL 11 Using sort_intersect(Population,CountryID); Using where
1 SIMPLE City index_merge Population,CountryID,CountryName Population,CountryID 4,3 NULL 11 Using sort_intersect(Population,CountryID); Using where
EXPLAIN
SELECT * FROM City
WHERE Country='CHN' AND Population > 1500000 AND Name LIKE 'C%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name,CountryID,CountryName CountryName,Population 38,4 NULL 1 Using sort_intersect(CountryName,Population); Using where
1 SIMPLE City index_merge Population,Name,CountryID,CountryName CountryName,Population 38,4 NULL 1 Using sort_intersect(CountryName,Population); Using where
SELECT * FROM City USE INDEX ()
WHERE Country LIKE 'M%' AND Population > 1000000;
ID Name Country Population
...
...
@@ -1026,7 +1026,7 @@ EXPLAIN
SELECT * FROM t1
WHERE (f1 < 535 OR f1 > 985) AND ( f4='r' OR f4 LIKE 'a%' ) ;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY,f4 PRIMARY,f4 4,35 NULL 1 Using sort_intersect(PRIMARY,f4); Using where
1 SIMPLE t1 index_merge PRIMARY,f4 PRIMARY,f4 4,35 NULL 1 Using sort_intersect(PRIMARY,f4); Using where
SELECT * FROM t1
WHERE (f1 < 535 OR f1 > 985) AND ( f4='r' OR f4 LIKE 'a%' ) ;