创建mysql分区表及操作

/*创建分区表按月份分区*/

create table o_order(id int auto_increment comment '序号',
orderid varchar(200) comment '订单号',
account varchar(50) comment '帐号',
status int comment '状态 0进行中 1成功 2失败',
addtime datetime comment '添加时间',
rvctime datetime comment '完成时间',
remark varchar(200) comment '备注',
primary key (id,addtime)
)engine=innodb partition by range(to_days(addtime))
( partition p201411 values less than (to_days('2014-11-01')),
partition p201412 values less than (to_days('2014-12-01')),
partition p201501 values less than (to_days('2015-01-01')),
partition p201502 values less than (to_days('2015-02-01')),
partition p201503 values less than (to_days('2015-03-01')));

添加分区 
ALTER TABLE o_order ADD PARTITION (PARTITION p201504 values less than (to_days('2015-04-01')));

删除分区

ALTER TABLE o_order DROP PARTITION p201504;

-- 查看分区表信息

SHOW CREATE TABLE o_order;
SHOW TABLE STATUS LIKE 'o_order';

SELECT
partition_name part,
partition_expression expr,
partition_description descr,
table_rows
FROM
INFORMATION_SCHEMA.partitions
WHERE
TABLE_SCHEMA = schema()
AND TABLE_NAME='表名';