607 lines
19 KiB
Plaintext
607 lines
19 KiB
Plaintext
|
drop table if exists t1,t2,t3;
|
|||
|
|
SET SQL_WARNINGS=1;
|
|||
|
|
CREATE TABLE t1 (
|
|||
|
|
ID CHAR(32) NOT NULL,
|
|||
|
|
name CHAR(32) NOT NULL,
|
|||
|
|
value CHAR(255),
|
|||
|
|
INDEX indexIDname (ID(8),name(8))
|
|||
|
|
) ;
|
|||
|
|
INSERT INTO t1 VALUES
|
|||
|
|
('keyword','indexdir','/export/home/local/www/database/indexes/keyword');
|
|||
|
|
INSERT INTO t1 VALUES ('keyword','urlprefix','text/ /text');
|
|||
|
|
INSERT INTO t1 VALUES ('keyword','urlmap','/text/ /');
|
|||
|
|
INSERT INTO t1 VALUES ('keyword','attr','personal employee company');
|
|||
|
|
INSERT INTO t1 VALUES
|
|||
|
|
('emailgids','indexdir','/export/home/local/www/database/indexes/emailgids');
|
|||
|
|
INSERT INTO t1 VALUES ('emailgids','urlprefix','text/ /text');
|
|||
|
|
INSERT INTO t1 VALUES ('emailgids','urlmap','/text/ /');
|
|||
|
|
INSERT INTO t1 VALUES ('emailgids','attr','personal employee company');
|
|||
|
|
SELECT value FROM t1 WHERE ID='emailgids' AND name='attr';
|
|||
|
|
value
|
|||
|
|
personal employee company
|
|||
|
|
drop table t1;
|
|||
|
|
CREATE TABLE t1 (
|
|||
|
|
price int(5) DEFAULT '0' NOT NULL,
|
|||
|
|
area varchar(40) DEFAULT '' NOT NULL,
|
|||
|
|
type varchar(40) DEFAULT '' NOT NULL,
|
|||
|
|
transityes enum('Y','N') DEFAULT 'Y' NOT NULL,
|
|||
|
|
shopsyes enum('Y','N') DEFAULT 'Y' NOT NULL,
|
|||
|
|
schoolsyes enum('Y','N') DEFAULT 'Y' NOT NULL,
|
|||
|
|
petsyes enum('Y','N') DEFAULT 'Y' NOT NULL,
|
|||
|
|
KEY price (price,area,type,transityes,shopsyes,schoolsyes,petsyes)
|
|||
|
|
);
|
|||
|
|
INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','N','N','N','N');
|
|||
|
|
INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','N','N','N','N');
|
|||
|
|
INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','','','','');
|
|||
|
|
Warnings:
|
|||
|
|
Warning 1265 Data truncated for column 'transityes' at row 1
|
|||
|
|
Warning 1265 Data truncated for column 'shopsyes' at row 1
|
|||
|
|
Warning 1265 Data truncated for column 'schoolsyes' at row 1
|
|||
|
|
Warning 1265 Data truncated for column 'petsyes' at row 1
|
|||
|
|
INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
|
|||
|
|
INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
|
|||
|
|
INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
|
|||
|
|
INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
|
|||
|
|
INSERT INTO t1 VALUES (900,'Vancouver','Shared/Roomate','Y','Y','Y','Y');
|
|||
|
|
SELECT * FROM t1 WHERE area='Vancouver' and transityes='y' and schoolsyes='y' and ( ((type='1 Bedroom' or type='Studio/Bach') and (price<=500)) or ((type='2 Bedroom') and (price<=550)) or ((type='Shared/Roomate') and (price<=300)) or ((type='Room and Board') and (price<=500)) ) and price <= 400;
|
|||
|
|
price area type transityes shopsyes schoolsyes petsyes
|
|||
|
|
drop table t1;
|
|||
|
|
CREATE TABLE t1 (program enum('signup','unique','sliding') not null, type enum('basic','sliding','signup'), sites set('mt'), PRIMARY KEY (program));
|
|||
|
|
ALTER TABLE t1 modify program enum('signup','unique','sliding');
|
|||
|
|
drop table t1;
|
|||
|
|
CREATE TABLE t1 (
|
|||
|
|
name varchar(50) DEFAULT '' NOT NULL,
|
|||
|
|
author varchar(50) DEFAULT '' NOT NULL,
|
|||
|
|
category decimal(10,0) DEFAULT '0' NOT NULL,
|
|||
|
|
email varchar(50),
|
|||
|
|
password varchar(50),
|
|||
|
|
proxy varchar(50),
|
|||
|
|
bitmap varchar(20),
|
|||
|
|
msg varchar(255),
|
|||
|
|
urlscol varchar(127),
|
|||
|
|
urlhttp varchar(127),
|
|||
|
|
timeout decimal(10,0),
|
|||
|
|
nbcnx decimal(10,0),
|
|||
|
|
creation decimal(10,0),
|
|||
|
|
livinguntil decimal(10,0),
|
|||
|
|
lang decimal(10,0),
|
|||
|
|
type decimal(10,0),
|
|||
|
|
subcat decimal(10,0),
|
|||
|
|
subtype decimal(10,0),
|
|||
|
|
reg char(1),
|
|||
|
|
scs varchar(255),
|
|||
|
|
capacity decimal(10,0),
|
|||
|
|
userISP varchar(50),
|
|||
|
|
CCident varchar(50) DEFAULT '' NOT NULL,
|
|||
|
|
PRIMARY KEY (name,author,category)
|
|||
|
|
);
|
|||
|
|
INSERT INTO t1 VALUES
|
|||
|
|
('patnom','patauteur',0,'p.favre@cryo-networks.fr',NULL,NULL,'#p2sndnq6ae5g1u6t','essai salut','scol://195.242.78.119:patauteur.patnom',NULL,NULL,NULL,950036174,-882087474,NULL,3,0,3,'1','Pub/patnom/futur_divers.scs',NULL,'pat','CC1');
|
|||
|
|
INSERT INTO t1 VALUES
|
|||
|
|
('LeNomDeMonSite','Marc',0,'m.barilley@cryo-networks.fr',NULL,NULL,NULL,NULL,'scol://195.242.78.119:Marc.LeNomDeMonSite',NULL,NULL,NULL,950560434,-881563214,NULL,3,0,3,'1','Pub/LeNomDeMonSite/domus_hibere.scs',NULL,'Marq','CC1');
|
|||
|
|
select * from t1 where name='patnom' and author='patauteur' and category=0;
|
|||
|
|
name author category email password proxy bitmap msg urlscol urlhttp timeout nbcnx creation livinguntil lang type subcat subtype reg scs capacity userISP CCident
|
|||
|
|
patnom patauteur 0 p.favre@cryo-networks.fr NULL NULL #p2sndnq6ae5g1u6t essai salut scol://195.242.78.119:patauteur.patnom NULL NULL NULL 950036174 -882087474 NULL 3 0 3 1 Pub/patnom/futur_divers.scs NULL pat CC1
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1
|
|||
|
|
(
|
|||
|
|
name_id int not null auto_increment,
|
|||
|
|
name blob,
|
|||
|
|
INDEX name_idx (name(5)),
|
|||
|
|
primary key (name_id)
|
|||
|
|
);
|
|||
|
|
INSERT t1 VALUES(NULL,'/');
|
|||
|
|
INSERT t1 VALUES(NULL,'[T,U]_axpby');
|
|||
|
|
SELECT * FROM t1 WHERE name='[T,U]_axpy';
|
|||
|
|
name_id name
|
|||
|
|
SELECT * FROM t1 WHERE name='[T,U]_axpby';
|
|||
|
|
name_id name
|
|||
|
|
2 [T,U]_axpby
|
|||
|
|
create table t2
|
|||
|
|
(
|
|||
|
|
name_id int not null auto_increment,
|
|||
|
|
name char(255) binary,
|
|||
|
|
INDEX name_idx (name(5)),
|
|||
|
|
primary key (name_id)
|
|||
|
|
);
|
|||
|
|
INSERT t2 select * from t1;
|
|||
|
|
SELECT * FROM t2 WHERE name='[T,U]_axpy';
|
|||
|
|
name_id name
|
|||
|
|
SELECT * FROM t2 WHERE name='[T,U]_axpby';
|
|||
|
|
name_id name
|
|||
|
|
2 [T,U]_axpby
|
|||
|
|
CREATE TABLE t3 SELECT * FROM t2 WHERE name='[T,U]_axpby';
|
|||
|
|
SELECT * FROM t2 WHERE name='[T,U]_axpby';
|
|||
|
|
name_id name
|
|||
|
|
2 [T,U]_axpby
|
|||
|
|
drop table t1,t2,t3;
|
|||
|
|
create table t1
|
|||
|
|
(
|
|||
|
|
SEQNO numeric(12 ) not null,
|
|||
|
|
MOTYPEID numeric(12 ) not null,
|
|||
|
|
MOINSTANCEID numeric(12 ) not null,
|
|||
|
|
ATTRID numeric(12 ) not null,
|
|||
|
|
VALUE varchar(120) not null,
|
|||
|
|
primary key (SEQNO, MOTYPEID, MOINSTANCEID, ATTRID, VALUE )
|
|||
|
|
);
|
|||
|
|
INSERT INTO t1 VALUES (1, 1, 1, 1, 'a');
|
|||
|
|
INSERT INTO t1 VALUES (1, 1, 1, 1, 'b');
|
|||
|
|
INSERT INTO t1 VALUES (1, 1, 1, 1, 'a');
|
|||
|
|
ERROR 23000: Duplicate entry '1-1-1-1-a' for key 'PRIMARY'
|
|||
|
|
drop table t1;
|
|||
|
|
CREATE TABLE t1 (
|
|||
|
|
a tinytext NOT NULL,
|
|||
|
|
b tinyint(3) unsigned NOT NULL default '0',
|
|||
|
|
PRIMARY KEY (a(32),b)
|
|||
|
|
) ENGINE=MyISAM;
|
|||
|
|
INSERT INTO t1 VALUES ('a',1),('a',2);
|
|||
|
|
SELECT * FROM t1 WHERE a='a' AND b=2;
|
|||
|
|
a b
|
|||
|
|
a 2
|
|||
|
|
SELECT * FROM t1 WHERE a='a' AND b in (2);
|
|||
|
|
a b
|
|||
|
|
a 2
|
|||
|
|
SELECT * FROM t1 WHERE a='a' AND b in (1,2);
|
|||
|
|
a b
|
|||
|
|
a 1
|
|||
|
|
a 2
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (a int not null unique, b int unique, c int, d int not null primary key, key(c), e int not null unique);
|
|||
|
|
show keys from t1;
|
|||
|
|
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
|
|||
|
|
t1 0 PRIMARY 1 d A 0 NULL NULL BTREE
|
|||
|
|
t1 0 a 1 a A 0 NULL NULL BTREE
|
|||
|
|
t1 0 e 1 e A 0 NULL NULL BTREE
|
|||
|
|
t1 0 b 1 b A NULL NULL NULL YES BTREE
|
|||
|
|
t1 1 c 1 c A NULL NULL NULL YES BTREE
|
|||
|
|
drop table t1;
|
|||
|
|
CREATE TABLE t1 (c CHAR(10) NOT NULL,i INT NOT NULL AUTO_INCREMENT,
|
|||
|
|
UNIQUE (c,i));
|
|||
|
|
INSERT INTO t1 (c) VALUES (NULL),(NULL);
|
|||
|
|
Warnings:
|
|||
|
|
Warning 1048 Column 'c' cannot be null
|
|||
|
|
Warning 1048 Column 'c' cannot be null
|
|||
|
|
SELECT * FROM t1;
|
|||
|
|
c i
|
|||
|
|
1
|
|||
|
|
2
|
|||
|
|
INSERT INTO t1 (c) VALUES ('a'),('a');
|
|||
|
|
SELECT * FROM t1;
|
|||
|
|
c i
|
|||
|
|
1
|
|||
|
|
2
|
|||
|
|
a 1
|
|||
|
|
a 2
|
|||
|
|
DROP TABLE IF EXISTS t1;
|
|||
|
|
CREATE TABLE t1 (c CHAR(10) NULL, i INT NOT NULL AUTO_INCREMENT,
|
|||
|
|
UNIQUE (c,i));
|
|||
|
|
INSERT INTO t1 (c) VALUES (NULL),(NULL);
|
|||
|
|
SELECT * FROM t1;
|
|||
|
|
c i
|
|||
|
|
NULL 1
|
|||
|
|
NULL 2
|
|||
|
|
INSERT INTO t1 (c) VALUES ('a'),('a');
|
|||
|
|
SELECT * FROM t1;
|
|||
|
|
c i
|
|||
|
|
NULL 1
|
|||
|
|
NULL 2
|
|||
|
|
a 1
|
|||
|
|
a 2
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (i int, a char(200), b text, unique (a), unique (b(300))) charset utf8;
|
|||
|
|
insert t1 values (1, repeat('a',210), repeat('b', 310));
|
|||
|
|
Warnings:
|
|||
|
|
Warning 1265 Data truncated for column 'a' at row 1
|
|||
|
|
insert t1 values (2, repeat(0xD0B1,215), repeat(0xD0B1, 310));
|
|||
|
|
Warnings:
|
|||
|
|
Warning 1265 Data truncated for column 'a' at row 1
|
|||
|
|
select i, length(a), length(b), char_length(a), char_length(b) from t1;
|
|||
|
|
i length(a) length(b) char_length(a) char_length(b)
|
|||
|
|
1 200 310 200 310
|
|||
|
|
2 400 620 200 310
|
|||
|
|
select i from t1 where a=repeat(_utf8 'a',200);
|
|||
|
|
i
|
|||
|
|
1
|
|||
|
|
select i from t1 where a=repeat(_utf8 0xD0B1,200);
|
|||
|
|
i
|
|||
|
|
2
|
|||
|
|
select i from t1 where b=repeat(_utf8 'b',310);
|
|||
|
|
i
|
|||
|
|
1
|
|||
|
|
drop table t1;
|
|||
|
|
CREATE TABLE t1 (id int unsigned auto_increment, name char(50), primary key (id)) engine=myisam;
|
|||
|
|
insert into t1 (name) values ('a'), ('b'),('c'),('d'),('e'),('f'),('g');
|
|||
|
|
explain select 1 from t1 where id =2;
|
|||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|||
|
|
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
|
|||
|
|
explain select 1 from t1 where id =2 or id=3;
|
|||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|||
|
|
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 7 Using where; Using index
|
|||
|
|
explain select name from t1 where id =2;
|
|||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|||
|
|
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
|
|||
|
|
ALTER TABLE t1 DROP PRIMARY KEY, ADD INDEX (id);
|
|||
|
|
explain select 1 from t1 where id =2;
|
|||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|||
|
|
1 SIMPLE t1 ref id id 4 const 1 Using index
|
|||
|
|
drop table t1;
|
|||
|
|
CREATE TABLE t1 (numeropost mediumint(8) unsigned NOT NULL default '0', numreponse int(10) unsigned NOT NULL auto_increment, PRIMARY KEY (numeropost,numreponse), UNIQUE KEY numreponse (numreponse));
|
|||
|
|
INSERT INTO t1 (numeropost,numreponse) VALUES ('1','1'),('1','2'),('2','3'),('2','4');
|
|||
|
|
SELECT numeropost FROM t1 WHERE numreponse='1';
|
|||
|
|
numeropost
|
|||
|
|
1
|
|||
|
|
EXPLAIN SELECT numeropost FROM t1 WHERE numreponse='1';
|
|||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|||
|
|
1 SIMPLE t1 const numreponse numreponse 4 const 1 Using index
|
|||
|
|
FLUSH TABLES;
|
|||
|
|
SELECT numeropost FROM t1 WHERE numreponse='1';
|
|||
|
|
numeropost
|
|||
|
|
1
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (c varchar(30) character set utf8, t text character set utf8, unique (c(2)), unique (t(3))) engine=myisam;
|
|||
|
|
show create table t1;
|
|||
|
|
Table Create Table
|
|||
|
|
t1 CREATE TABLE `t1` (
|
|||
|
|
`c` varchar(30) CHARACTER SET utf8 DEFAULT NULL,
|
|||
|
|
`t` text CHARACTER SET utf8,
|
|||
|
|
UNIQUE KEY `c` (`c`(2)),
|
|||
|
|
UNIQUE KEY `t` (`t`(3))
|
|||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|||
|
|
insert t1 values ('cccc', 'tttt'),
|
|||
|
|
(0xD0B1212223D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1212223D0B1D0B1D0B1D0B1),
|
|||
|
|
(0xD0B1222123D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1222123D0B1D0B1D0B1D0B1);
|
|||
|
|
insert t1 (c) values ('cc22');
|
|||
|
|
ERROR 23000: Duplicate entry 'cc22' for key 'c'
|
|||
|
|
insert t1 (t) values ('ttt22');
|
|||
|
|
ERROR 23000: Duplicate entry 'ttt22' for key 't'
|
|||
|
|
insert t1 (c) values (0xD0B1212322D0B1D0B1D0B1D0B1D0B1);
|
|||
|
|
ERROR 23000: Duplicate entry 'б!#"<22>' for key 'c'
|
|||
|
|
insert t1 (t) values (0xD0B1D0B1212322D0B1D0B1D0B1D0B1);
|
|||
|
|
ERROR 23000: Duplicate entry 'бб!#"б' for key 't'
|
|||
|
|
select c from t1 where c='cccc';
|
|||
|
|
c
|
|||
|
|
cccc
|
|||
|
|
select t from t1 where t='tttt';
|
|||
|
|
t
|
|||
|
|
tttt
|
|||
|
|
select c from t1 where c=0xD0B1212223D0B1D0B1D0B1D0B1D0B1;
|
|||
|
|
c
|
|||
|
|
?!"#?????
|
|||
|
|
select t from t1 where t=0xD0B1D0B1212223D0B1D0B1D0B1D0B1;
|
|||
|
|
t
|
|||
|
|
??!"#????
|
|||
|
|
drop table t1;
|
|||
|
|
DROP TABLE IF EXISTS t1;
|
|||
|
|
Warnings:
|
|||
|
|
Note 1051 Unknown table 't1'
|
|||
|
|
CREATE TABLE t1 (
|
|||
|
|
c1 int,
|
|||
|
|
c2 varbinary(240),
|
|||
|
|
UNIQUE KEY (c1),
|
|||
|
|
KEY (c2)
|
|||
|
|
) ENGINE=MyISAM;
|
|||
|
|
INSERT INTO t1 VALUES (1,'\Z\Z\Z\Z');
|
|||
|
|
INSERT INTO t1 VALUES (2,'\Z\Z\Z\Z\Z\Z');
|
|||
|
|
INSERT INTO t1 VALUES (3,'\Z\Z\Z\Z');
|
|||
|
|
select c1 from t1 where c2='\Z\Z\Z\Z';
|
|||
|
|
c1
|
|||
|
|
1
|
|||
|
|
3
|
|||
|
|
DELETE FROM t1 WHERE (c1 = 1);
|
|||
|
|
check table t1;
|
|||
|
|
Table Op Msg_type Msg_text
|
|||
|
|
test.t1 check status OK
|
|||
|
|
select c1 from t1 where c2='\Z\Z\Z\Z';
|
|||
|
|
c1
|
|||
|
|
3
|
|||
|
|
DELETE FROM t1 WHERE (c1 = 3);
|
|||
|
|
check table t1;
|
|||
|
|
Table Op Msg_type Msg_text
|
|||
|
|
test.t1 check status OK
|
|||
|
|
select c1 from t1 where c2='\Z\Z\Z\Z';
|
|||
|
|
c1
|
|||
|
|
truncate table t1;
|
|||
|
|
insert into t1 values(1,"aaaa"),(2,"aaab"),(3,"aaac"),(4,"aaccc");
|
|||
|
|
delete from t1 where c1=3;
|
|||
|
|
delete from t1 where c1=1;
|
|||
|
|
delete from t1 where c1=4;
|
|||
|
|
check table t1;
|
|||
|
|
Table Op Msg_type Msg_text
|
|||
|
|
test.t1 check status OK
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (c char(10), index (c(0)));
|
|||
|
|
ERROR HY000: Key part 'c' length cannot be 0
|
|||
|
|
create table t1 (c char(10), index (c,c));
|
|||
|
|
ERROR 42S21: Duplicate column name 'c'
|
|||
|
|
create table t1 (c1 char(10), c2 char(10), index (c1,c2,c1));
|
|||
|
|
ERROR 42S21: Duplicate column name 'c1'
|
|||
|
|
create table t1 (c1 char(10), c2 char(10), index (c1,c1,c2));
|
|||
|
|
ERROR 42S21: Duplicate column name 'c1'
|
|||
|
|
create table t1 (c1 char(10), c2 char(10), index (c2,c1,c1));
|
|||
|
|
ERROR 42S21: Duplicate column name 'c1'
|
|||
|
|
create table t1 (c1 char(10), c2 char(10));
|
|||
|
|
alter table t1 add key (c1,c1);
|
|||
|
|
ERROR 42S21: Duplicate column name 'c1'
|
|||
|
|
alter table t1 add key (c2,c1,c1);
|
|||
|
|
ERROR 42S21: Duplicate column name 'c1'
|
|||
|
|
alter table t1 add key (c1,c2,c1);
|
|||
|
|
ERROR 42S21: Duplicate column name 'c1'
|
|||
|
|
alter table t1 add key (c1,c1,c2);
|
|||
|
|
ERROR 42S21: Duplicate column name 'c1'
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (
|
|||
|
|
i1 INT NOT NULL,
|
|||
|
|
i2 INT NOT NULL,
|
|||
|
|
UNIQUE i1idx (i1),
|
|||
|
|
UNIQUE i2idx (i2));
|
|||
|
|
desc t1;
|
|||
|
|
Field Type Null Key Default Extra
|
|||
|
|
i1 int(11) NO PRI NULL
|
|||
|
|
i2 int(11) NO UNI NULL
|
|||
|
|
show create table t1;
|
|||
|
|
Table Create Table
|
|||
|
|
t1 CREATE TABLE `t1` (
|
|||
|
|
`i1` int(11) NOT NULL,
|
|||
|
|
`i2` int(11) NOT NULL,
|
|||
|
|
UNIQUE KEY `i1idx` (`i1`),
|
|||
|
|
UNIQUE KEY `i2idx` (`i2`)
|
|||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (
|
|||
|
|
c1 int,
|
|||
|
|
c2 varchar(20) not null,
|
|||
|
|
primary key (c1),
|
|||
|
|
key (c2(10))
|
|||
|
|
) engine=myisam;
|
|||
|
|
insert into t1 values (1,'');
|
|||
|
|
insert into t1 values (2,' \t\tTest String');
|
|||
|
|
insert into t1 values (3,' \n\tTest String');
|
|||
|
|
update t1 set c2 = 'New Test String' where c1 = 1;
|
|||
|
|
select * from t1;
|
|||
|
|
c1 c2
|
|||
|
|
1 New Test String
|
|||
|
|
2 Test String
|
|||
|
|
3
|
|||
|
|
Test String
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (a varchar(10), b varchar(10), key(a(10),b(10)));
|
|||
|
|
show create table t1;
|
|||
|
|
Table Create Table
|
|||
|
|
t1 CREATE TABLE `t1` (
|
|||
|
|
`a` varchar(10) DEFAULT NULL,
|
|||
|
|
`b` varchar(10) DEFAULT NULL,
|
|||
|
|
KEY `a` (`a`,`b`)
|
|||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|||
|
|
alter table t1 modify b varchar(20);
|
|||
|
|
show create table t1;
|
|||
|
|
Table Create Table
|
|||
|
|
t1 CREATE TABLE `t1` (
|
|||
|
|
`a` varchar(10) DEFAULT NULL,
|
|||
|
|
`b` varchar(20) DEFAULT NULL,
|
|||
|
|
KEY `a` (`a`,`b`)
|
|||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|||
|
|
alter table t1 modify a varchar(20);
|
|||
|
|
show create table t1;
|
|||
|
|
Table Create Table
|
|||
|
|
t1 CREATE TABLE `t1` (
|
|||
|
|
`a` varchar(20) DEFAULT NULL,
|
|||
|
|
`b` varchar(20) DEFAULT NULL,
|
|||
|
|
KEY `a` (`a`,`b`)
|
|||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (a int not null primary key, b varchar(20) not null unique);
|
|||
|
|
desc t1;
|
|||
|
|
Field Type Null Key Default Extra
|
|||
|
|
a int(11) NO PRI NULL
|
|||
|
|
b varchar(20) NO UNI NULL
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (a int not null primary key, b int not null unique);
|
|||
|
|
desc t1;
|
|||
|
|
Field Type Null Key Default Extra
|
|||
|
|
a int(11) NO PRI NULL
|
|||
|
|
b int(11) NO UNI NULL
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (a int not null primary key, b varchar(20) not null, unique (b(10)));
|
|||
|
|
desc t1;
|
|||
|
|
Field Type Null Key Default Extra
|
|||
|
|
a int(11) NO PRI NULL
|
|||
|
|
b varchar(20) NO UNI NULL
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (a int not null primary key, b varchar(20) not null, c varchar(20) not null, unique(b(10),c(10)));
|
|||
|
|
desc t1;
|
|||
|
|
Field Type Null Key Default Extra
|
|||
|
|
a int(11) NO PRI NULL
|
|||
|
|
b varchar(20) NO MUL NULL
|
|||
|
|
c varchar(20) NO NULL
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1 (
|
|||
|
|
c1 int,
|
|||
|
|
c2 char(12),
|
|||
|
|
c3 varchar(123),
|
|||
|
|
c4 timestamp,
|
|||
|
|
index (c1),
|
|||
|
|
index i1 (c1),
|
|||
|
|
index i2 (c2),
|
|||
|
|
index i3 (c3),
|
|||
|
|
unique i4 (c4),
|
|||
|
|
index i5 (c1, c2, c3, c4),
|
|||
|
|
primary key (c2, c3),
|
|||
|
|
index (c2, c4));
|
|||
|
|
show create table t1;
|
|||
|
|
Table Create Table
|
|||
|
|
t1 CREATE TABLE `t1` (
|
|||
|
|
`c1` int(11) DEFAULT NULL,
|
|||
|
|
`c2` char(12) NOT NULL DEFAULT '',
|
|||
|
|
`c3` varchar(123) NOT NULL DEFAULT '',
|
|||
|
|
`c4` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
|
|||
|
|
PRIMARY KEY (`c2`,`c3`),
|
|||
|
|
UNIQUE KEY `i4` (`c4`),
|
|||
|
|
KEY `c1` (`c1`),
|
|||
|
|
KEY `i1` (`c1`),
|
|||
|
|
KEY `i2` (`c2`),
|
|||
|
|
KEY `i3` (`c3`),
|
|||
|
|
KEY `i5` (`c1`,`c2`,`c3`,`c4`),
|
|||
|
|
KEY `c2` (`c2`,`c4`)
|
|||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|||
|
|
alter table t1 drop index c1;
|
|||
|
|
alter table t1 add index (c1);
|
|||
|
|
alter table t1 add index (c1);
|
|||
|
|
alter table t1 drop index i3;
|
|||
|
|
alter table t1 add index i3 (c3);
|
|||
|
|
alter table t1 drop index i2, drop index i4;
|
|||
|
|
alter table t1 add index i2 (c2), add index i4 (c4);
|
|||
|
|
alter table t1 drop index i2, drop index i4, add index i6 (c2, c4);
|
|||
|
|
alter table t1 add index i2 (c2), add index i4 (c4), drop index i6;
|
|||
|
|
alter table t1 drop index i2, drop index i4, add unique i4 (c4);
|
|||
|
|
alter table t1 add index i2 (c2), drop index i4, add index i4 (c4);
|
|||
|
|
alter table t1 drop index c2, add index (c2(4),c3(7));
|
|||
|
|
alter table t1 drop index c2, add index (c2(4),c3(7));
|
|||
|
|
alter table t1 add primary key (c1, c2), drop primary key;
|
|||
|
|
alter table t1 drop primary key;
|
|||
|
|
alter table t1 add primary key (c1, c2), drop primary key;
|
|||
|
|
ERROR 42000: Can't DROP 'PRIMARY'; check that column/key exists
|
|||
|
|
show create table t1;
|
|||
|
|
Table Create Table
|
|||
|
|
t1 CREATE TABLE `t1` (
|
|||
|
|
`c1` int(11) NOT NULL DEFAULT '0',
|
|||
|
|
`c2` char(12) NOT NULL DEFAULT '',
|
|||
|
|
`c3` varchar(123) NOT NULL DEFAULT '',
|
|||
|
|
`c4` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
|
|||
|
|
KEY `i1` (`c1`),
|
|||
|
|
KEY `i5` (`c1`,`c2`,`c3`,`c4`),
|
|||
|
|
KEY `c1` (`c1`),
|
|||
|
|
KEY `c1_2` (`c1`),
|
|||
|
|
KEY `i3` (`c3`),
|
|||
|
|
KEY `i2` (`c2`),
|
|||
|
|
KEY `i4` (`c4`),
|
|||
|
|
KEY `c2` (`c2`(4),`c3`(7))
|
|||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|||
|
|
insert into t1 values(1, 'a', 'a', NULL);
|
|||
|
|
insert into t1 values(1, 'b', 'b', NULL);
|
|||
|
|
alter table t1 drop index i3, drop index i2, drop index i1;
|
|||
|
|
alter table t1 add index i3 (c3), add index i2 (c2), add unique index i1 (c1);
|
|||
|
|
ERROR 23000: Duplicate entry '1' for key 'i1'
|
|||
|
|
drop table t1;
|
|||
|
|
CREATE TABLE t1( a TINYINT, KEY(a) ) ENGINE=MyISAM;
|
|||
|
|
INSERT INTO t1 VALUES( 1 );
|
|||
|
|
ALTER TABLE t1 DISABLE KEYS;
|
|||
|
|
EXPLAIN SELECT MAX(a) FROM t1 FORCE INDEX(a);
|
|||
|
|
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;
|
|||
|
|
CREATE TABLE t1 (
|
|||
|
|
a INTEGER auto_increment PRIMARY KEY,
|
|||
|
|
b INTEGER NOT NULL,
|
|||
|
|
c INTEGER NOT NULL,
|
|||
|
|
d CHAR(64)
|
|||
|
|
);
|
|||
|
|
CREATE TABLE t2 (
|
|||
|
|
a INTEGER auto_increment PRIMARY KEY,
|
|||
|
|
b INTEGER NOT NULL,
|
|||
|
|
c SMALLINT NOT NULL,
|
|||
|
|
d DATETIME NOT NULL,
|
|||
|
|
e SMALLINT NOT NULL,
|
|||
|
|
f INTEGER NOT NULL,
|
|||
|
|
g INTEGER NOT NULL,
|
|||
|
|
h SMALLINT NOT NULL,
|
|||
|
|
i INTEGER NOT NULL,
|
|||
|
|
j INTEGER NOT NULL,
|
|||
|
|
UNIQUE INDEX (b),
|
|||
|
|
INDEX (b, d, e, f, g, h, i, j, c),
|
|||
|
|
INDEX (c)
|
|||
|
|
);
|
|||
|
|
INSERT INTO t2 VALUES
|
|||
|
|
(NULL, 1, 254, '1000-01-01 00:00:00', 257, 0, 0, 0, 0, 0),
|
|||
|
|
(NULL, 2, 1, '2004-11-30 12:00:00', 1, 0, 0, 0, 0, 0),
|
|||
|
|
(NULL, 3, 1, '2004-11-30 12:00:00', 1, 0, 0, 2, -21600, 0),
|
|||
|
|
(NULL, 4, 1, '2004-11-30 12:00:00', 1, 0, 0, 2, -10800, 0),
|
|||
|
|
(NULL, 5, 1, '2004-11-30 12:00:00', 1, 0, 0, 5, -10800, 0),
|
|||
|
|
(NULL, 6, 1, '2004-11-30 12:00:00', 102, 0, 0, 0, 0, 0),
|
|||
|
|
(NULL, 7, 1, '2004-11-30 12:00:00', 105, 2, 0, 0, 0, 0),
|
|||
|
|
(NULL, 8, 1, '2004-11-30 12:00:00', 105, 10, 0, 0, 0, 0);
|
|||
|
|
INSERT INTO t1 (b, c, d) VALUES
|
|||
|
|
(3388000, -553000, NULL),
|
|||
|
|
(3388000, -553000, NULL);
|
|||
|
|
SELECT *
|
|||
|
|
FROM t2 c JOIN t1 pa ON c.b = pa.a
|
|||
|
|
WHERE c.c = 1
|
|||
|
|
ORDER BY c.b, c.d
|
|||
|
|
;
|
|||
|
|
a b c d e f g h i j a b c d
|
|||
|
|
2 2 1 2004-11-30 12:00:00 1 0 0 0 0 0 2 3388000 -553000 NULL
|
|||
|
|
DROP TABLE t1, t2;
|
|||
|
|
create table t1(a int not null, key aa(a),
|
|||
|
|
b char(10) not null, unique key bb(b(1)),
|
|||
|
|
c char(4) not null, unique key cc(c));
|
|||
|
|
desc t1;
|
|||
|
|
Field Type Null Key Default Extra
|
|||
|
|
a int(11) NO MUL NULL
|
|||
|
|
b char(10) NO UNI NULL
|
|||
|
|
c char(4) NO PRI NULL
|
|||
|
|
show create table t1;
|
|||
|
|
Table Create Table
|
|||
|
|
t1 CREATE TABLE `t1` (
|
|||
|
|
`a` int(11) NOT NULL,
|
|||
|
|
`b` char(10) NOT NULL,
|
|||
|
|
`c` char(4) NOT NULL,
|
|||
|
|
UNIQUE KEY `cc` (`c`),
|
|||
|
|
UNIQUE KEY `bb` (`b`(1)),
|
|||
|
|
KEY `aa` (`a`)
|
|||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|||
|
|
drop table t1;
|
|||
|
|
create table t1(a int not null, key aa(a),
|
|||
|
|
b char(10) not null, unique key bb(b(1)),
|
|||
|
|
c char(4) not null);
|
|||
|
|
desc t1;
|
|||
|
|
Field Type Null Key Default Extra
|
|||
|
|
a int(11) NO MUL NULL
|
|||
|
|
b char(10) NO UNI NULL
|
|||
|
|
c char(4) NO NULL
|
|||
|
|
alter table t1 add unique key cc(c);
|
|||
|
|
desc t1;
|
|||
|
|
Field Type Null Key Default Extra
|
|||
|
|
a int(11) NO MUL NULL
|
|||
|
|
b char(10) NO UNI NULL
|
|||
|
|
c char(4) NO PRI NULL
|
|||
|
|
show create table t1;
|
|||
|
|
Table Create Table
|
|||
|
|
t1 CREATE TABLE `t1` (
|
|||
|
|
`a` int(11) NOT NULL,
|
|||
|
|
`b` char(10) NOT NULL,
|
|||
|
|
`c` char(4) NOT NULL,
|
|||
|
|
UNIQUE KEY `cc` (`c`),
|
|||
|
|
UNIQUE KEY `bb` (`b`(1)),
|
|||
|
|
KEY `aa` (`a`)
|
|||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|||
|
|
drop table t1;
|
|||
|
|
End of 5.0 tests
|
|||
|
|
DROP TABLE IF EXISTS t1;
|
|||
|
|
CREATE TABLE t1 (a INT PRIMARY KEY AUTO_INCREMENT);
|
|||
|
|
INSERT INTO t1 VALUES (), (), ();
|
|||
|
|
SELECT 1 AS c1
|
|||
|
|
FROM t1
|
|||
|
|
ORDER BY (
|
|||
|
|
SELECT 1 AS c2
|
|||
|
|
FROM t1
|
|||
|
|
GROUP BY GREATEST(LAST_INSERT_ID(), t1.a) ASC
|
|||
|
|
LIMIT 1);
|
|||
|
|
c1
|
|||
|
|
1
|
|||
|
|
1
|
|||
|
|
1
|
|||
|
|
DROP TABLE t1;
|
|||
|
|
CREATE TABLE t1 (a INT, b INT, INDEX (a,b));
|
|||
|
|
INSERT INTO t1 (a, b)
|
|||
|
|
VALUES
|
|||
|
|
(1,1), (1,2), (1,3), (1,4), (1,5),
|
|||
|
|
(2,2), (2,3), (2,1), (3,1), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6);
|
|||
|
|
EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE
|
|||
|
|
(SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12;
|
|||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|||
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
|||
|
|
2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by
|
|||
|
|
SELECT 1 as RES FROM t1 AS t1_outer WHERE
|
|||
|
|
(SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12;
|
|||
|
|
RES
|
|||
|
|
DROP TABLE t1;
|