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synced 2025-01-19 21:42:35 +01:00
49 lines
1.5 KiB
Text
49 lines
1.5 KiB
Text
drop table if exists t1;
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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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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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) TYPE=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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drop table t1;
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