Home Database Mysql Tutorial 十三、mysql 分区之 RANGE && LIST_MySQL

十三、mysql 分区之 RANGE && LIST_MySQL

May 31, 2016 am 08:46 AM

1.RANGE 分区    创建实例:    CREATE TABLE EMP (        id int not null primary key auto_increment,        name char(25) not null default ''    )    PARTITION BY RANGE (id) ( 将字段id定义为分区的字段    PARTITION P0 VALUES LESS THAN (100), 99以下的id都归到p0分区    PARTITION P1 VALUES LESS THAN (200), 100-199    PARTITION P2 VALUES LESS THAN (300)  200-299    );    PS::因为默认会将0也算进去,所以P0实际可以存储0-99或-数    PS::要么不包含主键,如果要包含主键,那么分区字段也必须是主键    PS::mysql5.5以上支持日期进行分区,有什么作用,^_^,你可以想到的    2.List分区    创建实例:    CREATE TABLE LIST_EMP (        tid int not null PRIMARY key auto_increment,        tname char(20)    )    PARTITION BY LIST (tid) (        PARTITION P0 VALUES IN (1,3,5,7,9),          PARTITION P1 VALUES IN (2,4,6,8,10)    );    PS::通过上面的2种分区不难看出,RANGE分区是指定一个范围,而List分区是指定一个列表,在list中,只有指定的值才能存进去!    PS::个人觉得List分区更多可以用在分类上面    测试:    insert into list_emp values (null,'Php');    insert into list_emp values (null,'Php');    insert into list_emp values (null,'Php');    insert into list_emp values (null,'Php');    insert into list_emp values (null,'Php');    insert into list_emp values (null,'Php');    insert into list_emp values (null,'Php');    insert into list_emp values (null,'Php');    insert into list_emp values (null,'Php');    insert into list_emp values (null,'Php');        insert into list_emp values (null,'Php');ERROR 1526 (HY000): Table has no partition for value 11        PS::第11条数据的时候报错,因为没有任何分区表包含了它
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