mysql 按日期分区



1、建立分区表
CREATE TABLE sale_data (
sale_date  DATETIME NOT NULL,
ale_item  VARCHAR(2) NOT NULL,
sale_money DECIMAL(10,2) NOT NULL
)
PARTITION BY RANGE ((year(sale_date)*100+month(sale_date))*100+day(sale_date)) (
PARTITION s20100401 VALUES LESS THAN (20100402),
PARTITION s20100402 VALUES LESS THAN (20100403),
PARTITION s20100403 VALUES LESS THAN (20100404),
PARTITION s20100404 VALUES LESS THAN (20100405),
PARTITION s20100405 VALUES LESS THAN (20100406),
PARTITION s20100406 VALUES LESS THAN (20100407),
PARTITION p1 VALUES LESS THAN (MAXVALUE)
);

2、增加分区
PARTITION p1 VALUES LESS THAN (MAXVALUE) 这句要去掉，才可以增加分区
ALTER TABLE sale_data
 ADD PARTITION (PARTITION s20100402 VALUES LESS THAN (20100403));

3、删除分区
ALTER TABLE sale_data DROP PARTITION s20100406 ;

4、正常使用
insert into sale_data  values('2010-04-01','11',11.11);
insert into sale_data  values('2010-04-02','22',22.22);

5、查看数据是否已经分区保存
SELECT PARTITION_NAME,TABLE_ROWS
FROM INFORMATION_SCHEMA.PARTITIONS
WHERE TABLE_NAME = 'sale_data';

+----------------+------------+
| PARTITION_NAME | TABLE_ROWS |
+----------------+------------+
| s20100401      |          1 |
| s20100402      |          1 |
+----------------+------------+
2 rows in set (0.09 sec)