mirror of
https://github.com/MariaDB/server.git
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248 lines
7.4 KiB
Text
248 lines
7.4 KiB
Text
drop table if exists t1,t2,t3;
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create table t1(id1 int not null auto_increment primary key, t char(12));
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create table t2(id2 int not null, t char(12));
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create table t3(id3 int not null, t char(12), index(id3));
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select count(*) from t1 where id1 > 95;
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count(*)
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5
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select count(*) from t2 where id2 > 95;
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count(*)
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25
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select count(*) from t3 where id3 > 95;
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count(*)
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250
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update t1,t2,t3 set t1.t="aaa", t2.t="bbb", t3.t="cc" where t1.id1 = t2.id2 and t2.id2 = t3.id3 and t1.id1 > 90;
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select count(*) from t1 where t = "aaa";
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count(*)
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10
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select count(*) from t1 where id1 > 90;
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count(*)
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10
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select count(*) from t2 where t = "bbb";
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count(*)
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50
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select count(*) from t2 where id2 > 90;
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count(*)
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50
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select count(*) from t3 where t = "cc";
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count(*)
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500
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select count(*) from t3 where id3 > 90;
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count(*)
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500
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delete t1.*, t2.*, t3.* from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3 and t1.id1 > 95;
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check table t1, t2, t3;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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test.t2 check status OK
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test.t3 check status OK
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select count(*) from t1 where id1 > 95;
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count(*)
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0
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select count(*) from t2 where id2 > 95;
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count(*)
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0
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select count(*) from t3 where id3 > 95;
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count(*)
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0
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delete t1, t2, t3 from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3 and t1.id1 > 5;
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select count(*) from t1 where id1 > 5;
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count(*)
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0
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select count(*) from t2 where id2 > 5;
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count(*)
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0
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select count(*) from t3 where id3 > 5;
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count(*)
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0
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delete from t1, t2, t3 using t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3 and t1.id1 > 0;
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select count(*) from t1 where id1;
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count(*)
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0
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select count(*) from t2 where id2;
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count(*)
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0
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select count(*) from t3 where id3;
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count(*)
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0
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drop table t1,t2,t3;
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create table t1(id1 int not null primary key, t varchar(100)) pack_keys = 1;
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create table t2(id2 int not null, t varchar(100), index(id2)) pack_keys = 1;
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delete t1 from t1,t2 where t1.id1 = t2.id2 and t1.id1 > 500;
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drop table t1,t2;
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CREATE TABLE t1 (
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id int(11) NOT NULL default '0',
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name varchar(10) default NULL,
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PRIMARY KEY (id)
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) TYPE=MyISAM;
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INSERT INTO t1 VALUES (1,'aaa'),(2,'aaa'),(3,'aaa');
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CREATE TABLE t2 (
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id int(11) NOT NULL default '0',
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name varchar(10) default NULL,
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PRIMARY KEY (id)
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) TYPE=MyISAM;
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INSERT INTO t2 VALUES (2,'bbb'),(3,'bbb'),(4,'bbb');
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CREATE TABLE t3 (
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id int(11) NOT NULL default '0',
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mydate datetime default NULL,
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PRIMARY KEY (id)
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) TYPE=MyISAM;
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INSERT INTO t3 VALUES (1,'2002-02-04 00:00:00'),(3,'2002-05-12 00:00:00'),(5,'2002-05-12 00:00:00'),(6,'2002-06-22
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00:00:00'),(7,'2002-07-22 00:00:00');
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delete t1,t2,t3 from t1,t2,t3 where to_days(now())-to_days(t3.mydate)>=30 and t3.id=t1.id and t3.id=t2.id;
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select * from t3;
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id mydate
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1 2002-02-04 00:00:00
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5 2002-05-12 00:00:00
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6 2002-06-22 00:00:00
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7 2002-07-22 00:00:00
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DROP TABLE IF EXISTS t1,t2,t3;
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CREATE TABLE IF NOT EXISTS `t1` (
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`id` int(11) NOT NULL auto_increment,
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`tst` text,
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`tst1` text,
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PRIMARY KEY (`id`)
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) TYPE=MyISAM;
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CREATE TABLE IF NOT EXISTS `t2` (
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`ID` int(11) NOT NULL auto_increment,
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`ParId` int(11) default NULL,
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`tst` text,
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`tst1` text,
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PRIMARY KEY (`ID`),
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KEY `IX_ParId_t2` (`ParId`),
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FOREIGN KEY (`ParId`) REFERENCES `t1` (`id`)
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) TYPE=MyISAM;
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INSERT INTO t1(tst,tst1) VALUES("MySQL","MySQL AB"), ("MSSQL","Microsoft"), ("ORACLE","ORACLE");
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INSERT INTO t2(ParId) VALUES(1), (2), (3);
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select * from t2;
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ID ParId tst tst1
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1 1 NULL NULL
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2 2 NULL NULL
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3 3 NULL NULL
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UPDATE t2, t1 SET t2.tst = t1.tst, t2.tst1 = t1.tst1 WHERE t2.ParId = t1.Id;
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select * from t2;
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ID ParId tst tst1
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1 1 MySQL MySQL AB
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2 2 MSSQL Microsoft
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3 3 ORACLE ORACLE
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drop table if exists t1, t2 ;
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create table t1 (n numeric(10));
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create table t2 (n numeric(10));
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insert into t2 values (1),(2),(4),(8),(16),(32);
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select * from t2 left outer join t1 using (n);
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n n
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1 NULL
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2 NULL
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4 NULL
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8 NULL
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16 NULL
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32 NULL
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delete t1,t2 from t2 left outer join t1 using (n);
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select * from t2 left outer join t1 using (n);
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n n
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drop table t1,t2 ;
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create table t1 (n int(10) not null primary key, d int(10));
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create table t2 (n int(10) not null primary key, d int(10));
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insert into t1 values(1,1);
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insert into t2 values(1,10),(2,20);
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LOCK TABLES t1 write, t2 read;
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DELETE t1.*, t2.* FROM t1,t2 where t1.n=t2.n;
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Table 't2' was locked with a READ lock and can't be updated
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UPDATE t1,t2 SET t1.d=t2.d,t2.d=30 WHERE t1.n=t2.n;
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Table 't2' was locked with a READ lock and can't be updated
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UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
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Table 't2' was locked with a READ lock and can't be updated
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unlock tables;
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LOCK TABLES t1 write, t2 write;
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UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
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select * from t1;
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n d
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1 10
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DELETE t1.*, t2.* FROM t1,t2 where t1.n=t2.n;
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select * from t1;
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n d
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select * from t2;
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n d
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2 20
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unlock tables;
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drop table t1,t2;
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set sql_safe_updates=1;
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create table t1 (n int(10), d int(10));
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create table t2 (n int(10), d int(10));
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insert into t1 values(1,1);
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insert into t2 values(1,10),(2,20);
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UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
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You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column
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set sql_safe_updates=0;
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drop table t1,t2;
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set timestamp=1038401397;
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create table t1 (n int(10) not null primary key, d int(10), t timestamp);
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create table t2 (n int(10) not null primary key, d int(10), t timestamp);
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insert into t1 values(1,1,NULL);
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insert into t2 values(1,10,NULL),(2,20,NULL);
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set timestamp=1038000000;
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UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
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select n,d,unix_timestamp(t) from t1;
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n d unix_timestamp(t)
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1 10 1038000000
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select n,d,unix_timestamp(t) from t2;
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n d unix_timestamp(t)
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1 10 1038401397
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2 20 1038401397
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UPDATE t1,t2 SET 1=2 WHERE t1.n=t2.n;
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You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near '1=2 WHERE t1.n=t2.n' at line 1
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drop table t1,t2;
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set timestamp=0;
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set sql_safe_updates=0;
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create table t1 (n int(10) not null primary key, d int(10));
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create table t2 (n int(10) not null primary key, d int(10));
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insert into t1 values(1,1), (3,3);
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insert into t2 values(1,10),(2,20);
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UPDATE t2 left outer join t1 on t1.n=t2.n SET t1.d=t2.d;
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select * from t1;
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n d
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1 10
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3 3
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select * from t2;
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n d
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1 10
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2 20
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drop table t1,t2;
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create table t1 (n int(10), d int(10));
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create table t2 (n int(10), d int(10));
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insert into t1 values(1,1),(1,2);
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insert into t2 values(1,10),(2,20);
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UPDATE t1,t2 SET t1.d=t2.d,t2.d=30 WHERE t1.n=t2.n;
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select * from t1;
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n d
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1 10
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1 10
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select * from t2;
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n d
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1 30
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2 20
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drop table t1,t2;
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create table t1 (n int(10), d int(10));
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create table t2 (n int(10), d int(10));
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insert into t1 values(1,1),(3,2);
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insert into t2 values(1,10),(1,20);
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UPDATE t1,t2 SET t1.d=t2.d,t2.d=30 WHERE t1.n=t2.n;
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select * from t1;
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n d
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1 10
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3 2
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select * from t2;
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n d
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1 30
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1 30
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drop table t1,t2;
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drop table if exists t1,t2,t3;
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CREATE TABLE t1 ( broj int(4) unsigned NOT NULL default '0', naziv char(25) NOT NULL default 'NEPOZNAT', PRIMARY KEY (broj)) TYPE=MyISAM;
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INSERT INTO t1 VALUES (1,'jedan'),(2,'dva'),(3,'tri'),(4,'xxxxxxxxxx'),(5,'a'),(10,''),(11,''),(12,''),(13,'');
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CREATE TABLE t2 ( broj int(4) unsigned NOT NULL default '0', naziv char(25) NOT NULL default 'NEPOZNAT', PRIMARY KEY (broj)) TYPE=MyISAM;
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INSERT INTO t2 VALUES (1,'jedan'),(2,'dva'),(3,'tri'),(4,'xxxxxxxxxx'),(5,'a');
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CREATE TABLE t3 ( broj int(4) unsigned NOT NULL default '0', naziv char(25) NOT NULL default 'NEPOZNAT', PRIMARY KEY (broj)) TYPE=MyISAM;
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INSERT INTO t3 VALUES (1,'jedan'),(2,'dva');
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update t1,t2 set t1.naziv="aaaa" where t1.broj=t2.broj;
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update t1,t2,t3 set t1.naziv="bbbb", t2.naziv="aaaa" where t1.broj=t2.broj and t2.broj=t3.broj;
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drop table if exists t1,t2,t3;
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