MySQL 分表

创建数据表

 

create table member(
id bigint auto_increment primary key,
name varchar(20),
sex tinyint not null default '0'
)engine=myisam default charset=utf8 auto_increment=1;

 

加入点数据：

  insert into member(id,name,sex) values (1,'jacson','0');

  insert into member(name,sex) select name,sex from member;

第二条语句多执行几次就有了很多数据

2，下面我们进行分表：这里我们分两个表tb_member1,tb_member2

 

DROP table IF EXISTS tb_member1;
create table tb_member1(
    id bigint primary key auto_increment ,
    name varchar(20),
    sex tinyint not null default '0'
)ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ; 

DROP table IF EXISTS tb_member2;
create table tb_member2(
    id bigint primary key auto_increment ,
    name varchar(20),
    sex tinyint not null default '0'
)ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ; 

//创建tb_member2也可以用下面的语句  create table tb_member2 like tb_member1;

3,创建主表tb_member

DROP table IF EXISTS tb_member;
create table tb_member(
id bigint primary key auto_increment ,
name varchar(20),
sex tinyint not null default '0'
)ENGINE=MERGE UNION=(tb_member1,tb_member2) INSERT_METHOD=LAST CHARSET=utf8 AUTO_INCREMENT=1 ;

4,接下来，我们把数据分到两个分表中去：

insert into tb_member1(id,name,sex) select id,name,sex from member where id%2=0;

insert into tb_member2(id,name,sex) select id,name,sex from member where id%2=1;