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DROP DATABASE IF EXISTS test;
CREATE DATABASE test;
use test;
drop table if exists table_1;
drop table if exists table_2;
drop table if exists table_3;
drop table if exists table_4;
drop table if exists stat_test;
create table stat_test(a int);
create table table_1(
a int not null primary key,
b int,
c int not null,
d varchar(50),
key(b)
) engine=innodb;
create table table_2(
a int not null primary key auto_increment,
b int,
c int not null,
d varchar(50)
) engine=innodb;
create table table_3(
a int not null,
b int,
c int not null,
d varchar(50),
primary key(a, c)
) engine=innodb;
create table table_4(
a int
) engine=innodb;
insert into table_1 values
(1, 2, 3, 4),
(2, null, 3, 4),
(3, 2, 3, "\t"),
(4, 2, 3, "\n");
insert into table_3 select * from table_1;
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