2003-11-17 21:45:07 +01:00
|
|
|
drop table if exists t1,t11,t12,t2;
|
2001-09-28 07:05:54 +02:00
|
|
|
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, primary key (a,a,a,a,a,a,a,a,a,a));
|
|
|
|
|
insert into t1 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, primary key (a,a,a,a,a,a,a,a,a,a));
|
|
|
|
|
insert into t1 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;
|
2003-03-17 14:05:04 +01:00
|
|
|
CREATE TABLE `t1` (
|
2002-12-15 21:01:09 +01:00
|
|
|
`i` int(10) NOT NULL default '0',
|
|
|
|
|
`i2` int(10) NOT NULL default '0',
|
|
|
|
|
PRIMARY KEY (`i`)
|
2003-03-17 14:05:04 +01:00
|
|
|
);
|
|
|
|
|
DELETE FROM t1 USING t1 WHERE post='1';
|
2003-06-04 17:28:51 +02:00
|
|
|
ERROR 42S22: Unknown column 'post' in 'where clause'
|
2003-03-17 14:05:04 +01:00
|
|
|
drop table t1;
|
2003-03-07 11:36:52 +01:00
|
|
|
CREATE TABLE t1 (
|
|
|
|
|
bool char(0) default NULL,
|
|
|
|
|
not_null varchar(20) binary NOT NULL default '',
|
|
|
|
|
misc integer not null,
|
|
|
|
|
PRIMARY KEY (not_null)
|
|
|
|
|
) TYPE=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
|
2003-05-04 11:00:45 +02:00
|
|
|
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
|
2003-03-07 11:36:52 +01:00
|
|
|
drop table t1;
|
2003-11-17 21:45:07 +01:00
|
|
|
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 1241 Subquery returns more than 1 row
|
|
|
|
|
Error 1241 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 1241 Subquery returns more than 1 row
|
|
|
|
|
Error 1241 Subquery returns more than 1 row
|
|
|
|
|
select * from t11;
|
|
|
|
|
a b
|
|
|
|
|
0 10
|
|
|
|
|
1 11
|
|
|
|
|
drop table t11, t12, t2;
|
