mysql 分区小案例_mysql的range分区案例

1、实验案例mysql5.5 关于 range分区

2.要求，有一个员工表有(money,date),现在根据date字段进行分区

3.创建分区表

CREATE TABLE staff(

money INT NOT NULL DEFAULT 1000,

date_time DATE

)

PARTITION BY RANGE COLUMNS (date_time)

(

PARTITION p01 VALUES LESS THAN ('2009-01-01'),

PARTITION p02 VALUES LESS THAN ('2010-01-01'),

PARTITION p03 VALUES LESS THAN ('2011-01-01'),

PARTITION p04 VALUES LESS THAN (maxvalue)

);

4.添加数据

insert into staff (money,date_time) values (3000,'2008-06-07');

insert into staff (money,date_time) values (5000,'2009-06-07');

insert into staff (money,date_time) values (8000,'2010-06-07');

insert into staff (money,date_time) values (9000,'2011-06-07');

insert into staff (money,date_time) values (13000,date(now()));

5.查询分区数据(自动进行分区修剪,优化器会自动搜索p02分区)

5.1查询2009年的的所有薪水

mysql> explain partitions select * from staff where date_time>='2009-01-01' and date_time

*************************** 1. row ***************************

id: 1

select_type: SIMPLE

table: staff

partitions: p02

type: ALL

possible_keys: NULL

key: NULL

key_len: NULL

ref: NULL

rows: 2

Extra: Using where

1 row in set (0.00 sec)

6.快速删除分区数据

6.1快速删除2010年的所有薪水的历史记录

方法1:DELETE FROM staff WHERE date_time >= '2009-01-01' AND date_time < '2010-01-01'

方法2： alter table staff drop table p02;

在大量历史记录的情况下，直接用方法2，会非常好用。

7.查看test数据下staff具体形式

[root@client test]# ll

total 636

-rw-rw---- 1 mysql mysql 61 Jun 26 09:32 db.opt

-rw-rw---- 1 mysql mysql 8749 Jun 26 11:00 order1.frm

-rw-rw---- 1 mysql mysql 114688 Jun 26 11:16 order1.ibd

-rw-rw---- 1 mysql mysql 8602 Sep 11 12:40 staff.frm

-rw-rw---- 1 mysql mysql 36 Sep 11 12:40 staff.par

-rw-rw---- 1 mysql mysql 98304 Sep 11 12:40 staff#P#p01.ibd

-rw-rw---- 1 mysql mysql 98304 Sep 11 12:40 staff#P#p02.ibd

-rw-rw---- 1 mysql mysql 98304 Sep 11 12:40 staff#P#p03.ibd

-rw-rw---- 1 mysql mysql 98304 Sep 11 12:40 staff#P#p04.ibd

-rw-rw---- 1 mysql mysql 8645 Jun 26 09:49 user.frm

-rw-rw---- 1 mysql mysql 98304 Jun 26 11:16 user.ibd

[root@client test]#

8.显示创建表结构

mysql> show create table staff\G;

*************************** 1. row ***************************

Table: staff

Create Table: CREATE TABLE `staff` (

`money` int(11) NOT NULL DEFAULT '1000',

`date_time` date DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=utf8

/*!50500 PARTITION BY RANGE COLUMNS(date_time)

(PARTITION p01 VALUES LESS THAN ('2009-01-01') ENGINE = InnoDB,

PARTITION p02 VALUES LESS THAN ('2010-01-01') ENGINE = InnoDB,

PARTITION p03 VALUES LESS THAN ('2011-01-01') ENGINE = InnoDB,

PARTITION p04 VALUES LESS THAN (MAXVALUE) ENGINE = InnoDB) */

1 row in set (0.00 sec)