func_in.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 t1;
select 1 in (1,2,3);
1 in (1,2,3)
1
select 10 in (1,2,3);
10 in (1,2,3)
0
select NULL in (1,2,3);
NULL in (1,2,3)
NULL
select 1 in (1,NULL,3);
1 in (1,NULL,3)
1
select 3 in (1,NULL,3);
3 in (1,NULL,3)
1
select 10 in (1,NULL,3);
10 in (1,NULL,3)
NULL
select 1.5 in (1.5,2.5,3.5);
1.5 in (1.5,2.5,3.5)
1
select 10.5 in (1.5,2.5,3.5);
10.5 in (1.5,2.5,3.5)
0
select NULL in (1.5,2.5,3.5);
NULL in (1.5,2.5,3.5)
NULL
select 1.5 in (1.5,NULL,3.5);
1.5 in (1.5,NULL,3.5)
1
select 3.5 in (1.5,NULL,3.5);
3.5 in (1.5,NULL,3.5)
1
select 10.5 in (1.5,NULL,3.5);
10.5 in (1.5,NULL,3.5)
NULL
CREATE TABLE t1 (a int, b int, c int);
insert into t1 values (1,2,3), (1,NULL,3);
select 1 in (a,b,c) from t1;
1 in (a,b,c)
1
1
select 3 in (a,b,c) from t1;
3 in (a,b,c)
1
1
select 10 in (a,b,c) from t1;
10 in (a,b,c)
0
NULL
select NULL in (a,b,c) from t1;
NULL in (a,b,c)
NULL
NULL
drop table t1;
CREATE TABLE t1 (a float, b float, c float);
insert into t1 values (1.5,2.5,3.5), (1.5,NULL,3.5);
select 1.5 in (a,b,c) from t1;
1.5 in (a,b,c)
1
1
select 3.5 in (a,b,c) from t1;
3.5 in (a,b,c)
1
1
select 10.5 in (a,b,c) from t1;
10.5 in (a,b,c)
0
NULL
drop table t1;
CREATE TABLE t1 (a varchar(10), b varchar(10), c varchar(10));
insert into t1 values ('A','BC','EFD'), ('A',NULL,'EFD');
select 'A' in (a,b,c) from t1;
'A' in (a,b,c)
1
1
select 'EFD' in (a,b,c) from t1;
'EFD' in (a,b,c)
1
1
select 'XSFGGHF' in (a,b,c) from t1;
'XSFGGHF' in (a,b,c)
0
NULL
drop table t1;
CREATE TABLE t1 (field char(1));
INSERT INTO t1 VALUES ('A'),(NULL);
SELECT * from t1 WHERE field IN (NULL);
field
SELECT * from t1 WHERE field NOT IN (NULL);
field
SELECT * from t1 where field = field;
field
A
SELECT * from t1 where field <=> field;
field
A
NULL
DELETE FROM t1 WHERE field NOT IN (NULL);
SELECT * FROM t1;
field
A
NULL
drop table t1;
create table t1 (id int(10) primary key);
insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9);
select * from t1 where id in (2,5,9);
id
2
5
9
drop table t1;
create table t1 (
a char(1) character set latin1 collate latin1_general_ci,
b char(1) character set latin1 collate latin1_swedish_ci,
c char(1) character set latin1 collate latin1_danish_ci
);
insert into t1 values ('A','B','C');
insert into t1 values ('a','c','c');
select * from t1 where a in (b);
ERROR HY000: Illegal mix of collations (latin1_general_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '='
select * from t1 where a in (b,c);
ERROR HY000: Illegal mix of collations (latin1_general_ci,IMPLICIT), (latin1_swedish_ci,IMPLICIT), (latin1_danish_ci,IMPLICIT) for operation ' IN '
select * from t1 where 'a' in (a,b,c);
ERROR HY000: Illegal mix of collations for operation ' IN '
select * from t1 where 'a' in (a);
a	b	c
A	B	C
a	c	c
select * from t1 where a in ('a');
a	b	c
A	B	C
a	c	c
select * from t1 where 'a' collate latin1_general_ci in (a,b,c);
a	b	c
A	B	C
a	c	c
select * from t1 where 'a' collate latin1_bin in (a,b,c);
a	b	c
a	c	c
select * from t1 where 'a' in (a,b,c collate latin1_bin);
a	b	c
a	c	c
explain extended select * from t1 where 'a' in (a,b,c collate latin1_bin);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (_latin1'a' in (`test`.`t1`.`a`,`test`.`t1`.`b`,(`test`.`t1`.`c` collate latin1_bin)))
drop table t1;
set names utf8;
create table t1 (a char(10) character set utf8 not null);
insert into t1 values ('bbbb'),(_koi8r'妹妹'),(_latin1'哪哪');
select a from t1 where a in ('bbbb',_koi8r'妹妹',_latin1'哪哪') order by a;
a
脛脛脛脛
bbbb
褑褑褑褑
drop table t1;
create table t1 (a char(10) character set latin1 not null);
insert into t1 values ('a'),('b'),('c');
select a from t1 where a IN ('a','b','c') order by a;
a
a
b
c
drop table t1;
set names latin1;
select '1.0' in (1,2);
'1.0' in (1,2)
1
select 1 in ('1.0',2);
1 in ('1.0',2)
1
select 1 in (1,'2.0');
1 in (1,'2.0')
1
select 1 in ('1.0',2.0);
1 in ('1.0',2.0)
1
select 1 in (1.0,'2.0');
1 in (1.0,'2.0')
1
select 1 in ('1.1',2);
1 in ('1.1',2)
0
select 1 in ('1.1',2.0);
1 in ('1.1',2.0)
0
create table t1 (a char(2) character set binary);
insert into t1 values ('aa'), ('bb');
select * from t1 where a in (NULL, 'aa');
a
aa
drop table t1;
create table t1 (id int, key(id));
insert into t1 values (1),(2),(3);
select count(*) from t1 where id not in (1);
count(*)
2
select count(*) from t1 where id not in (1,2);
count(*)
1
drop table t1;
CREATE TABLE t1 (a int PRIMARY KEY);
INSERT INTO t1 VALUES (44), (45), (46);
SELECT * FROM t1 WHERE a IN (45);
a
45
SELECT * FROM t1 WHERE a NOT IN (0, 45);
a
44
46
SELECT * FROM t1 WHERE a NOT IN (45);
a
44
46
CREATE VIEW v1 AS SELECT * FROM t1 WHERE a NOT IN (45);
SHOW CREATE VIEW v1;
View	Create View
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`a` AS `a` from `t1` where (`t1`.`a` <> 45)
SELECT * FROM v1;
a
44
46
DROP VIEW v1;
DROP TABLE t1;