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drop table if exists t1,t2;
create table t1 (a int not null);
insert into t1 values (1);
insert into t1 values (a+2);
insert into t1 values (a+3);
insert into t1 values (4),(a+5);
select * from t1;
a
1
2
3
4
5
drop table t1;
create table t1 (id int not null auto_increment primary key, username varchar(32) not null, unique (username));
insert into t1 values (0,"mysql");
insert into t1 values (0,"mysql ab");
insert into t1 values (0,"mysql a");
insert into t1 values (0,"r1manic");
insert into t1 values (0,"r1man");
drop table t1;
create table t1 (a int not null auto_increment, primary key (a), t timestamp, c char(10) default "hello", i int);
insert into t1 values (default,default,default,default), (default,default,default,default), (4,0,"a",5),(default,default,default,default);
select a,t>0,c,i from t1;
a t>0 c i
1 1 hello NULL
2 1 hello NULL
4 0 a 5
5 1 hello NULL
truncate table t1;
insert into t1 set a=default,t=default,c=default;
insert into t1 set a=default,t=default,c=default,i=default;
insert into t1 set a=4,t=0,c="a",i=5;
insert into t1 set a=5,t=0,c="a",i=null;
insert into t1 set a=default,t=default,c=default,i=default;
select a,t>0,c,i from t1;
a t>0 c i
1 1 hello NULL
2 1 hello NULL
4 0 a 5
5 0 a NULL
6 1 hello NULL
drop table t1;
create table t1 (sid char(20), id int(2) NOT NULL auto_increment, key(sid, id));
insert into t1 values ('skr',NULL),('skr',NULL),('test',NULL);
select * from t1;
sid id
skr 1
skr 2
test 1
insert into t1 values ('rts',NULL),('rts',NULL),('test',NULL);
select * from t1;
sid id
rts 1
rts 2
skr 1
skr 2
test 1
test 2
drop table t1;
create table t1 (id int NOT NULL DEFAULT 8);
insert into t1 values(NULL);
ERROR 23000: Column 'id' cannot be null
insert into t1 values (1), (NULL), (2);
Warnings:
Warning 1262 Data truncated, NULL supplied to NOT NULL column 'id' at row 2
select * from t1;
id
1
0
2
drop table t1;
create table t1 (email varchar(50));
insert into t1 values ('sasha@mysql.com'),('monty@mysql.com'),('foo@hotmail.com'),('foo@aol.com'),('bar@aol.com');
create table t2(id int not null auto_increment primary key, t2 varchar(50), unique(t2));
insert into t2 (t2) select distinct substring(email, locate('@', email)+1) from t1;
select * from t2;
id t2
1 mysql.com
2 hotmail.com
3 aol.com
drop table t1,t2;
drop database if exists mysqltest;
create database mysqltest;
use mysqltest;
create table t1 (c int);
insert into mysqltest.t1 set mysqltest.t1.c = '1';
drop database mysqltest;
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