mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 20:42:30 +01:00
174 lines
4.2 KiB
Text
174 lines
4.2 KiB
Text
drop table if exists t1,t11,t12,t2;
|
|
CREATE TABLE t1 (a tinyint(3), b tinyint(5));
|
|
INSERT INTO t1 VALUES (1,1);
|
|
INSERT LOW_PRIORITY INTO t1 VALUES (1,2);
|
|
INSERT INTO t1 VALUES (1,3);
|
|
DELETE from t1 where a=1 limit 1;
|
|
DELETE LOW_PRIORITY from t1 where a=1;
|
|
INSERT INTO t1 VALUES (1,1);
|
|
DELETE from t1;
|
|
LOCK TABLE t1 write;
|
|
INSERT INTO t1 VALUES (1,2);
|
|
DELETE from t1;
|
|
UNLOCK TABLES;
|
|
INSERT INTO t1 VALUES (1,2);
|
|
SET AUTOCOMMIT=0;
|
|
DELETE from t1;
|
|
SET AUTOCOMMIT=1;
|
|
drop table t1;
|
|
create table t1 (
|
|
a bigint not null,
|
|
b bigint not null default 0,
|
|
c bigint not null default 0,
|
|
d bigint not null default 0,
|
|
e bigint not null default 0,
|
|
f bigint not null default 0,
|
|
g bigint not null default 0,
|
|
h bigint not null default 0,
|
|
i bigint not null default 0,
|
|
j bigint not null default 0,
|
|
primary key (a,b,c,d,e,f,g,h,i,j));
|
|
insert into t1 (a) values (2),(4),(6),(8),(10),(12),(14),(16),(18),(20),(22),(24),(26),(23);
|
|
delete from t1 where a=26;
|
|
drop table t1;
|
|
create table t1 (
|
|
a bigint not null,
|
|
b bigint not null default 0,
|
|
c bigint not null default 0,
|
|
d bigint not null default 0,
|
|
e bigint not null default 0,
|
|
f bigint not null default 0,
|
|
g bigint not null default 0,
|
|
h bigint not null default 0,
|
|
i bigint not null default 0,
|
|
j bigint not null default 0,
|
|
primary key (a,b,c,d,e,f,g,h,i,j));
|
|
insert into t1 (a) values (2),(4),(6),(8),(10),(12),(14),(16),(18),(20),(22),(24),(26),(23),(27);
|
|
delete from t1 where a=27;
|
|
drop table t1;
|
|
CREATE TABLE `t1` (
|
|
`i` int(10) NOT NULL default '0',
|
|
`i2` int(10) NOT NULL default '0',
|
|
PRIMARY KEY (`i`)
|
|
);
|
|
DELETE FROM t1 USING t1 WHERE post='1';
|
|
ERROR 42S22: Unknown column 'post' in 'where clause'
|
|
drop table t1;
|
|
CREATE TABLE t1 (
|
|
bool char(0) default NULL,
|
|
not_null varchar(20) binary NOT NULL default '',
|
|
misc integer not null,
|
|
PRIMARY KEY (not_null)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (NULL,'a',4), (NULL,'b',5), (NULL,'c',6), (NULL,'d',7);
|
|
select * from t1 where misc > 5 and bool is null;
|
|
bool not_null misc
|
|
NULL c 6
|
|
NULL d 7
|
|
delete from t1 where misc > 5 and bool is null;
|
|
select * from t1 where misc > 5 and bool is null;
|
|
bool not_null misc
|
|
select count(*) from t1;
|
|
count(*)
|
|
2
|
|
delete from t1 where 1 > 2;
|
|
select count(*) from t1;
|
|
count(*)
|
|
2
|
|
delete from t1 where 3 > 2;
|
|
select count(*) from t1;
|
|
count(*)
|
|
0
|
|
drop table t1;
|
|
create table t1 (a int not null auto_increment primary key, b char(32));
|
|
insert into t1 (b) values ('apple'), ('apple');
|
|
select * from t1;
|
|
a b
|
|
1 apple
|
|
2 apple
|
|
delete t1 from t1, t1 as t2 where t1.b = t2.b and t1.a > t2.a;
|
|
select * from t1;
|
|
a b
|
|
1 apple
|
|
drop table t1;
|
|
create table t11 (a int NOT NULL, b int, primary key (a));
|
|
create table t12 (a int NOT NULL, b int, primary key (a));
|
|
create table t2 (a int NOT NULL, b int, primary key (a));
|
|
insert into t11 values (0, 10),(1, 11),(2, 12);
|
|
insert into t12 values (33, 10),(0, 11),(2, 12);
|
|
insert into t2 values (1, 21),(2, 12),(3, 23);
|
|
select * from t11;
|
|
a b
|
|
0 10
|
|
1 11
|
|
2 12
|
|
select * from t12;
|
|
a b
|
|
33 10
|
|
0 11
|
|
2 12
|
|
select * from t2;
|
|
a b
|
|
1 21
|
|
2 12
|
|
3 23
|
|
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b <> (select b from t2 where t11.a < t2.a);
|
|
ERROR 21000: Subquery returns more than 1 row
|
|
select * from t11;
|
|
a b
|
|
0 10
|
|
1 11
|
|
2 12
|
|
select * from t12;
|
|
a b
|
|
33 10
|
|
0 11
|
|
2 12
|
|
delete ignore t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b <> (select b from t2 where t11.a < t2.a);
|
|
Warnings:
|
|
Error 1242 Subquery returns more than 1 row
|
|
Error 1242 Subquery returns more than 1 row
|
|
select * from t11;
|
|
a b
|
|
0 10
|
|
1 11
|
|
select * from t12;
|
|
a b
|
|
33 10
|
|
0 11
|
|
insert into t11 values (2, 12);
|
|
delete from t11 where t11.b <> (select b from t2 where t11.a < t2.a);
|
|
ERROR 21000: Subquery returns more than 1 row
|
|
select * from t11;
|
|
a b
|
|
0 10
|
|
1 11
|
|
2 12
|
|
delete ignore from t11 where t11.b <> (select b from t2 where t11.a < t2.a);
|
|
Warnings:
|
|
Error 1242 Subquery returns more than 1 row
|
|
Error 1242 Subquery returns more than 1 row
|
|
select * from t11;
|
|
a b
|
|
0 10
|
|
1 11
|
|
drop table t11, t12, t2;
|
|
create table t1 (a int, b int, unique key (a), key (b));
|
|
insert into t1 values (3, 3), (7, 7);
|
|
delete t1 from t1 where a = 3;
|
|
check table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 check status OK
|
|
select * from t1;
|
|
a b
|
|
7 7
|
|
drop table t1;
|
|
CREATE TABLE t1 ( a int PRIMARY KEY );
|
|
DELETE FROM t1 WHERE t1.a > 0 ORDER BY t1.a;
|
|
INSERT INTO t1 VALUES (0),(1),(2);
|
|
DELETE FROM t1 WHERE t1.a > 0 ORDER BY t1.a LIMIT 1;
|
|
SELECT * FROM t1;
|
|
a
|
|
0
|
|
2
|
|
DROP TABLE t1;
|