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291 lines
6 KiB
Text
291 lines
6 KiB
Text
drop table if exists t1;
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drop table if exists t2;
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SET SQL_WARNINGS=1;
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create table t1 (a int not null auto_increment,b int, primary key (a)) engine=myisam auto_increment=3;
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insert into t1 values (1,1),(NULL,3),(NULL,4);
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delete from t1 where a=4;
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insert into t1 values (NULL,5),(NULL,6);
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select * from t1;
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a b
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1 1
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3 3
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5 5
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6 6
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delete from t1 where a=6;
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replace t1 values (3,1);
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ALTER TABLE t1 add c int;
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replace t1 values (3,3,3);
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insert into t1 values (NULL,7,7);
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update t1 set a=8,b=b+1,c=c+1 where a=7;
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insert into t1 values (NULL,9,9);
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select * from t1;
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a b c
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1 1 NULL
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3 3 3
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5 5 NULL
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8 8 8
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9 9 9
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drop table t1;
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create table t1 (
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skey tinyint unsigned NOT NULL auto_increment PRIMARY KEY,
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sval char(20)
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);
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insert into t1 values (NULL, "hello");
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insert into t1 values (NULL, "hey");
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select * from t1;
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skey sval
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1 hello
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2 hey
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select _rowid,t1._rowid,skey,sval from t1;
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_rowid _rowid skey sval
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1 1 1 hello
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2 2 2 hey
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drop table t1;
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create table t1 (a char(10) not null, b int not null auto_increment, primary key(a,b));
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insert into t1 values ("a",1),("b",2),("a",2),("c",1);
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insert into t1 values ("a",NULL),("b",NULL),("c",NULL),("e",NULL);
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insert into t1 (a) values ("a"),("b"),("c"),("d");
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insert into t1 (a) values ('k'),('d');
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insert into t1 (a) values ("a");
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insert into t1 values ("d",last_insert_id());
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select * from t1;
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a b
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a 1
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a 2
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a 3
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a 4
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a 5
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b 2
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b 3
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b 4
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c 1
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c 2
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c 3
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d 1
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d 2
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d 5
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e 1
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k 1
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drop table t1;
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create table t1 (ordid int(8) not null auto_increment, ord varchar(50) not null, primary key (ordid), index(ord,ordid));
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insert into t1 (ordid,ord) values (NULL,'sdj'),(NULL,'sdj');
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select * from t1;
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ordid ord
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1 sdj
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2 sdj
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drop table t1;
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create table t1 (ordid int(8) not null auto_increment, ord varchar(50) not null, primary key (ord,ordid));
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insert into t1 values (NULL,'sdj'),(NULL,'sdj'),(NULL,"abc"),(NULL,'abc'),(NULL,'zzz'),(NULL,'sdj'),(NULL,'abc');
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select * from t1;
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ordid ord
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1 abc
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2 abc
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3 abc
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1 sdj
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2 sdj
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3 sdj
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1 zzz
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drop table t1;
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create table t1 (sid char(5), id int(2) NOT NULL auto_increment, key(sid, id));
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create table t2 (sid char(20), id int(2));
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insert into t2 values ('skr',NULL),('skr',NULL),('test',NULL);
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insert into t1 select * from t2;
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select * from t1;
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sid id
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skr 1
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skr 2
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test 1
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drop table t1,t2;
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create table t1 (a int not null primary key auto_increment);
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insert into t1 values (0);
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update t1 set a=0;
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select * from t1;
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a
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0
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check warning Found row where the auto_increment column has the value 0
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test.t1 check status OK
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drop table t1;
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create table t1 (a int not null auto_increment primary key);
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insert into t1 values (NULL);
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insert into t1 values (-1);
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select last_insert_id();
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last_insert_id()
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1
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insert into t1 values (NULL);
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select * from t1;
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a
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-1
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1
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2
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drop table t1;
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create table t1 (a int not null auto_increment primary key) /*!40102 engine=heap */;
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insert into t1 values (NULL);
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insert into t1 values (-1);
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select last_insert_id();
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last_insert_id()
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1
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insert into t1 values (NULL);
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select * from t1;
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a
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1
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-1
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2
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drop table t1;
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create table t1 (i tinyint unsigned not null auto_increment primary key);
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insert into t1 set i = 254;
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insert into t1 set i = null;
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select last_insert_id();
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last_insert_id()
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255
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explain extended select last_insert_id();
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select sql_no_cache last_insert_id() AS `last_insert_id()`
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insert into t1 set i = 254;
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ERROR 23000: Duplicate entry '254' for key 1
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select last_insert_id();
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last_insert_id()
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255
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insert into t1 set i = null;
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ERROR 23000: Duplicate entry '255' for key 1
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select last_insert_id();
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last_insert_id()
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0
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drop table t1;
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create table t1 (i tinyint unsigned not null auto_increment, key (i));
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insert into t1 set i = 254;
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insert into t1 set i = null;
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select last_insert_id();
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last_insert_id()
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255
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insert into t1 set i = null;
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Warnings:
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Warning 1264 Data truncated; out of range for column 'i' at row 1
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select last_insert_id();
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last_insert_id()
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255
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drop table t1;
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create table t1 (i tinyint unsigned not null auto_increment primary key, b int, unique (b));
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insert into t1 values (NULL, 10);
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select last_insert_id();
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last_insert_id()
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1
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insert into t1 values (NULL, 15);
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select last_insert_id();
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last_insert_id()
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2
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insert into t1 values (NULL, 10);
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ERROR 23000: Duplicate entry '10' for key 2
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select last_insert_id();
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last_insert_id()
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0
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drop table t1;
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create table t1(a int auto_increment,b int null,primary key(a));
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SET SQL_MODE=NO_AUTO_VALUE_ON_ZERO;
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insert into t1(a,b)values(NULL,1);
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insert into t1(a,b)values(200,2);
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insert into t1(a,b)values(0,3);
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insert into t1(b)values(4);
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insert into t1(b)values(5);
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insert into t1(b)values(6);
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insert into t1(b)values(7);
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select * from t1 order by b;
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a b
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1 1
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200 2
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0 3
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201 4
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202 5
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203 6
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204 7
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alter table t1 modify b mediumint;
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select * from t1 order by b;
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a b
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1 1
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200 2
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0 3
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201 4
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202 5
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203 6
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204 7
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create table t2 (a int);
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insert t2 values (1),(2);
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alter table t2 add b int auto_increment primary key;
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select * from t2;
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a b
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1 1
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2 2
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drop table t2;
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delete from t1 where a=0;
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update t1 set a=0 where b=5;
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select * from t1 order by b;
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a b
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1 1
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200 2
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201 4
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0 5
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203 6
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204 7
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delete from t1 where a=0;
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update t1 set a=NULL where b=6;
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Warnings:
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Warning 1263 Data truncated; NULL supplied to NOT NULL column 'a' at row 4
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update t1 set a=300 where b=7;
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SET SQL_MODE='';
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insert into t1(a,b)values(NULL,8);
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insert into t1(a,b)values(400,9);
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insert into t1(a,b)values(0,10);
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insert into t1(b)values(11);
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insert into t1(b)values(12);
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insert into t1(b)values(13);
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insert into t1(b)values(14);
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select * from t1 order by b;
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a b
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1 1
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200 2
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201 4
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0 6
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300 7
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301 8
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400 9
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401 10
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402 11
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403 12
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404 13
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405 14
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delete from t1 where a=0;
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update t1 set a=0 where b=12;
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select * from t1 order by b;
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a b
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1 1
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200 2
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201 4
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300 7
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301 8
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400 9
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401 10
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402 11
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0 12
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404 13
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405 14
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delete from t1 where a=0;
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update t1 set a=NULL where b=13;
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Warnings:
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Warning 1263 Data truncated; NULL supplied to NOT NULL column 'a' at row 9
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update t1 set a=500 where b=14;
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select * from t1 order by b;
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a b
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1 1
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200 2
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201 4
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300 7
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301 8
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400 9
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401 10
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402 11
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0 13
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500 14
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drop table t1;
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