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