join_nested.result

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5,t6,t7,t8,t9;
CREATE TABLE t0 (a int, b int, c int);
CREATE TABLE t1 (a int, b int, c int);
CREATE TABLE t2 (a int, b int, c int);
CREATE TABLE t3 (a int, b int, c int);
CREATE TABLE t4 (a int, b int, c int);
CREATE TABLE t5 (a int, b int, c int);
CREATE TABLE t6 (a int, b int, c int);
CREATE TABLE t7 (a int, b int, c int);
CREATE TABLE t8 (a int, b int, c int);
CREATE TABLE t9 (a int, b int, c int);
INSERT INTO t0 VALUES (1,1,0), (1,2,0), (2,2,0);
INSERT INTO t1 VALUES (1,3,0), (2,2,0), (3,2,0);
INSERT INTO t2 VALUES (3,3,0), (4,2,0), (5,3,0);
INSERT INTO t3 VALUES (1,2,0), (2,2,0);
INSERT INTO t4 VALUES (3,2,0), (4,2,0);
INSERT INTO t5 VALUES (3,1,0), (2,2,0), (3,3,0);
INSERT INTO t6 VALUES (3,2,0), (6,2,0), (6,1,0);
INSERT INTO t7 VALUES (1,1,0), (2,2,0);
INSERT INTO t8 VALUES (0,2,0), (1,2,0);
INSERT INTO t9 VALUES (1,1,0), (1,2,0), (3,3,0);
SELECT t2.a,t2.b
FROM t2;
a	b
3	3
4	2
5	3
SELECT t3.a,t3.b
FROM t3;
a	b
1	2
2	2
SELECT t4.a,t4.b
FROM t4;
a	b
3	2
4	2
SELECT t3.a,t3.b,t4.a,t4.b
FROM t3,t4;
a	b	a	b
1	2	3	2
2	2	3	2
1	2	4	2
2	2	4	2
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN              
(t3, t4)
ON t2.b=t4.b;
a	b	a	b	a	b
3	3	NULL	NULL	NULL	NULL
4	2	1	2	3	2
4	2	1	2	4	2
4	2	2	2	3	2
4	2	2	2	4	2
5	3	NULL	NULL	NULL	NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN              
(t3, t4)
ON t3.a=1 AND t2.b=t4.b;
a	b	a	b	a	b
3	3	NULL	NULL	NULL	NULL
4	2	1	2	3	2
4	2	1	2	4	2
5	3	NULL	NULL	NULL	NULL
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN              
(t3, t4)
ON t2.b=t4.b
WHERE t3.a=1 OR t3.c IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	
1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	Using where
1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` = 1) or isnull(`test`.`t3`.`c`))
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN              
(t3, t4)
ON t2.b=t4.b
WHERE t3.a=1 OR t3.c IS NULL;
a	b	a	b	a	b
3	3	NULL	NULL	NULL	NULL
4	2	1	2	3	2
4	2	1	2	4	2
5	3	NULL	NULL	NULL	NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN              
(t3, t4)
ON t2.b=t4.b
WHERE t3.a>1 OR t3.c IS NULL;
a	b	a	b	a	b
3	3	NULL	NULL	NULL	NULL
4	2	2	2	3	2
4	2	2	2	4	2
5	3	NULL	NULL	NULL	NULL
SELECT t5.a,t5.b
FROM t5;
a	b
3	1
2	2
3	3
SELECT t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t3,t4,t5;
a	b	a	b	a	b
1	2	3	2	3	1
2	2	3	2	3	1
1	2	4	2	3	1
2	2	4	2	3	1
1	2	3	2	2	2
2	2	3	2	2	2
1	2	4	2	2	2
2	2	4	2	2	2
1	2	3	2	3	3
2	2	3	2	3	3
1	2	4	2	3	3
2	2	4	2	3	3
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN              
(t3, t4, t5)
ON t2.b=t4.b;
a	b	a	b	a	b	a	b
3	3	NULL	NULL	NULL	NULL	NULL	NULL
4	2	1	2	3	2	3	1
4	2	1	2	3	2	2	2
4	2	1	2	3	2	3	3
4	2	1	2	4	2	3	1
4	2	1	2	4	2	2	2
4	2	1	2	4	2	3	3
4	2	2	2	3	2	3	1
4	2	2	2	3	2	2	2
4	2	2	2	3	2	3	3
4	2	2	2	4	2	3	1
4	2	2	2	4	2	2	2
4	2	2	2	4	2	3	3
5	3	NULL	NULL	NULL	NULL	NULL	NULL
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN              
(t3, t4, t5)
ON t2.b=t4.b
WHERE t3.a>1 OR t3.c IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	
1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	Using where
1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	
1	SIMPLE	t5	ALL	NULL	NULL	NULL	NULL	3	
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`))
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN              
(t3, t4, t5)
ON t2.b=t4.b
WHERE t3.a>1 OR t3.c IS NULL;
a	b	a	b	a	b	a	b
3	3	NULL	NULL	NULL	NULL	NULL	NULL
4	2	2	2	3	2	3	1
4	2	2	2	3	2	2	2
4	2	2	2	3	2	3	3
4	2	2	2	4	2	3	1
4	2	2	2	4	2	2	2
4	2	2	2	4	2	3	3
5	3	NULL	NULL	NULL	NULL	NULL	NULL
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN              
(t3, t4, t5)
ON t2.b=t4.b
WHERE (t3.a>1 OR t3.c IS NULL) AND 
(t5.a<3 OR t5.c IS NULL);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	
1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	Using where
1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	
1	SIMPLE	t5	ALL	NULL	NULL	NULL	NULL	3	Using where
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where (((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) and ((`test`.`t5`.`a` < 3) or isnull(`test`.`t5`.`c`)))
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN              
(t3, t4, t5)
ON t2.b=t4.b
WHERE (t3.a>1 OR t3.c IS NULL) AND 
(t5.a<3 OR t5.c IS NULL);
a	b	a	b	a	b	a	b
3	3	NULL	NULL	NULL	NULL	NULL	NULL
4	2	2	2	3	2	2	2
4	2	2	2	4	2	2	2
5	3	NULL	NULL	NULL	NULL	NULL	NULL
SELECT t6.a,t6.b
FROM t6;
a	b
3	2
6	2
6	1
SELECT t7.a,t7.b
FROM t7;
a	b
1	1
2	2
SELECT t6.a,t6.b,t7.a,t7.b
FROM t6,t7;
a	b	a	b
3	2	1	1
3	2	2	2
6	2	1	1
6	2	2	2
6	1	1	1
6	1	2	2
SELECT t8.a,t8.b
FROM t8;
a	b
0	2
1	2
EXPLAIN EXTENDED
SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM (t6, t7)
LEFT JOIN 
t8
ON t7.b=t8.b AND t6.b < 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t7	ALL	NULL	NULL	NULL	NULL	2	
1	SIMPLE	t6	ALL	NULL	NULL	NULL	NULL	3	
1	SIMPLE	t8	ALL	NULL	NULL	NULL	NULL	2	
Warnings:
Note	1003	select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t7`.`b` = `test`.`t8`.`b`) and (`test`.`t6`.`b` < 10))) where 1
SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM (t6, t7)
LEFT JOIN 
t8
ON t7.b=t8.b AND t6.b < 10;
a	b	a	b	a	b
3	2	1	1	NULL	NULL
3	2	2	2	0	2
3	2	2	2	1	2
6	2	1	1	NULL	NULL
6	2	2	2	0	2
6	2	2	2	1	2
6	1	1	1	NULL	NULL
6	1	2	2	0	2
6	1	2	2	1	2
SELECT t5.a,t5.b
FROM t5;
a	b
3	1
2	2
3	3
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 
LEFT JOIN 
( 
(t6, t7)
LEFT JOIN 
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b;
a	b	a	b	a	b	a	b
3	1	3	2	1	1	NULL	NULL
3	1	6	2	1	1	NULL	NULL
2	2	3	2	2	2	0	2
2	2	3	2	2	2	1	2
2	2	6	2	2	2	0	2
2	2	6	2	2	2	1	2
3	3	NULL	NULL	NULL	NULL	NULL	NULL
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 
LEFT JOIN 
( 
(t6, t7)
LEFT JOIN 
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b AND
(t8.a < 1 OR t8.c IS NULL);
a	b	a	b	a	b	a	b
3	1	3	2	1	1	NULL	NULL
3	1	6	2	1	1	NULL	NULL
2	2	3	2	2	2	0	2
2	2	6	2	2	2	0	2
3	3	NULL	NULL	NULL	NULL	NULL	NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN              
(t3, t4)
ON t3.a=1 AND t2.b=t4.b;
a	b	a	b	a	b
3	3	NULL	NULL	NULL	NULL
4	2	1	2	3	2
4	2	1	2	4	2
5	3	NULL	NULL	NULL	NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t2
LEFT JOIN              
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5 
LEFT JOIN 
( 
(t6, t7)
LEFT JOIN 
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b;
a	b	a	b	a	b	a	b	a	b	a	b	a	b
3	3	NULL	NULL	NULL	NULL	3	1	3	2	1	1	NULL	NULL
3	3	NULL	NULL	NULL	NULL	3	1	6	2	1	1	NULL	NULL
4	2	1	2	3	2	3	1	3	2	1	1	NULL	NULL
4	2	1	2	3	2	3	1	6	2	1	1	NULL	NULL
4	2	1	2	4	2	3	1	3	2	1	1	NULL	NULL
4	2	1	2	4	2	3	1	6	2	1	1	NULL	NULL
5	3	NULL	NULL	NULL	NULL	3	1	3	2	1	1	NULL	NULL
5	3	NULL	NULL	NULL	NULL	3	1	6	2	1	1	NULL	NULL
3	3	NULL	NULL	NULL	NULL	2	2	3	2	2	2	0	2
3	3	NULL	NULL	NULL	NULL	2	2	3	2	2	2	1	2
3	3	NULL	NULL	NULL	NULL	2	2	6	2	2	2	0	2
3	3	NULL	NULL	NULL	NULL	2	2	6	2	2	2	1	2
4	2	1	2	3	2	2	2	3	2	2	2	0	2
4	2	1	2	3	2	2	2	3	2	2	2	1	2
4	2	1	2	3	2	2	2	6	2	2	2	0	2
4	2	1	2	3	2	2	2	6	2	2	2	1	2
4	2	1	2	4	2	2	2	3	2	2	2	0	2
4	2	1	2	4	2	2	2	3	2	2	2	1	2
4	2	1	2	4	2	2	2	6	2	2	2	0	2
4	2	1	2	4	2	2	2	6	2	2	2	1	2
5	3	NULL	NULL	NULL	NULL	2	2	3	2	2	2	0	2
5	3	NULL	NULL	NULL	NULL	2	2	3	2	2	2	1	2
5	3	NULL	NULL	NULL	NULL	2	2	6	2	2	2	0	2
5	3	NULL	NULL	NULL	NULL	2	2	6	2	2	2	1	2
3	3	NULL	NULL	NULL	NULL	3	3	NULL	NULL	NULL	NULL	NULL	NULL
4	2	1	2	3	2	3	3	NULL	NULL	NULL	NULL	NULL	NULL
4	2	1	2	4	2	3	3	NULL	NULL	NULL	NULL	NULL	NULL
5	3	NULL	NULL	NULL	NULL	3	3	NULL	NULL	NULL	NULL	NULL	NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t2
LEFT JOIN              
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5 
LEFT JOIN 
( 
(t6, t7)
LEFT JOIN 
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
WHERE t2.a > 3 AND
(t6.a < 6 OR t6.c IS NULL);
a	b	a	b	a	b	a	b	a	b	a	b	a	b
4	2	1	2	3	2	3	1	3	2	1	1	NULL	NULL
4	2	1	2	4	2	3	1	3	2	1	1	NULL	NULL
5	3	NULL	NULL	NULL	NULL	3	1	3	2	1	1	NULL	NULL
4	2	1	2	3	2	2	2	3	2	2	2	0	2
4	2	1	2	3	2	2	2	3	2	2	2	1	2
4	2	1	2	4	2	2	2	3	2	2	2	0	2
4	2	1	2	4	2	2	2	3	2	2	2	1	2
5	3	NULL	NULL	NULL	NULL	2	2	3	2	2	2	0	2
5	3	NULL	NULL	NULL	NULL	2	2	3	2	2	2	1	2
4	2	1	2	3	2	3	3	NULL	NULL	NULL	NULL	NULL	NULL
4	2	1	2	4	2	3	3	NULL	NULL	NULL	NULL	NULL	NULL
5	3	NULL	NULL	NULL	NULL	3	3	NULL	NULL	NULL	NULL	NULL	NULL
SELECT t1.a,t1.b
FROM t1;