4
select charset(database());
7
4
select database() = "test";
10
select database() = _utf8"test";
11
database() = _utf8"test"
13
select database() = _latin1"test";
14
database() = _latin1"test"
16
7
select user() like "%@%";
19
select user() like _utf8"%@%";
20
user() like _utf8"%@%"
22
select user() like _latin1"%@%";
23
user() like _latin1"%@%"
25
select charset(user());
28
select version()>="3.23.29";
31
select version()>=_utf8"3.23.29";
32
version()>=_utf8"3.23.29"
34
select version()>=_latin1"3.23.29";
35
version()>=_latin1"3.23.29"
37
select charset(version());
10
select version() > "2009.01.756";
11
version() > "2009.01.756"
40
13
explain extended select database(), user();
41
14
id select_type table type possible_keys key key_len ref rows filtered Extra
42
15
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
44
Note 1003 select database() AS "database()",user() AS "user()"
17
Note 1003 select schema() AS `database()`,user() AS `user()`
45
18
create table t1 (version char(60)) select database(), user(), version() as 'version';
46
19
show create table t1;
48
t1 CREATE TABLE "t1" (
49
"database()" varchar(34) CHARACTER SET utf8,
50
"user()" varchar(77) CHARACTER SET utf8 NOT NULL,
52
) ENGINE=MyISAM DEFAULT CHARSET=latin1
54
select charset(charset(_utf8'a')), charset(collation(_utf8'a'));
55
charset(charset(_utf8'a')) charset(collation(_utf8'a'))
57
select collation(charset(_utf8'a')), collation(collation(_utf8'a'));
58
collation(charset(_utf8'a')) collation(collation(_utf8'a'))
59
utf8_general_ci utf8_general_ci
60
create table t1 select charset(_utf8'a'), collation(_utf8'a');
63
t1 CREATE TABLE "t1" (
64
"charset(_utf8'a')" varchar(64) CHARACTER SET utf8 NOT NULL,
65
"collation(_utf8'a')" varchar(64) CHARACTER SET utf8 NOT NULL
66
) ENGINE=MyISAM DEFAULT CHARSET=latin1
21
t1 CREATE TABLE `t1` (
22
`database()` VARBINARY(136) DEFAULT NULL,
23
`user()` VARBINARY(308) DEFAULT NULL,
24
`version` VARCHAR(60) COLLATE utf8_general_ci DEFAULT NULL
25
) ENGINE=DEFAULT COLLATE = utf8_general_ci
68
27
select TRUE,FALSE,NULL;
71
create table t1 (c1 char(5)) character set=latin1;
30
create table t1 (c1 char(5));
72
31
insert into t1 values('row 1');
73
32
insert into t1 values('row 2');
74
33
insert into t1 values('row 3');
75
select concat(user(), '--', c1) from t1;
76
concat(user(), '--', c1)
34
select concat(SUBSTRING(user(), 0, 4), '--', c1) from t1;
35
concat(SUBSTRING(user(), 0, 4), '--', c1)
80
39
select concat(database(), '--', c1) from t1;
81
40
concat(database(), '--', c1)
86
create table t1 (a char(10)) character set latin1;
45
create table t1 (a char(10));
87
46
select * from t1 where a=version();
89
48
select * from t1 where a=database();