MySQL子分区一例

这是现实中的一个例子，但是我不推荐使用MySQL分区用于生产

CREATE TABLE `t_log` (  `ID` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键ID',  `VERSON` int(11) NOT NULL DEFAULT 0 COMMENT ' 版本号',  `ACTIONS` varchar(100) DEFAULT NULL COMMENT ' 操作记录',  `ADMINID` int(11) DEFAULT 1 COMMENT '管理员ID',  `IP` varchar(20) DEFAULT '1' COMMENT ' 登录Ip',  `CDATE` datetime NOT NULL COMMENT '添加时间',  `UDATE` datetime NOT NULL COMMENT '修改时间',  PRIMARY KEY (`ID`,`CDATE`),  KEY `ADMINID` (`ADMINID`) USING BTREE) ENGINE=InnoDB   DEFAULT CHARSET=utf8 COMMENT='日志表'Time: 0.024sALTER TABLE `blog`.`t_log` PARTITION BY RANGE (year(`CDATE`))PARTITIONS 1SUBPARTITION BY HASH (to_days(`CDATE`))SUBPARTITIONS 4(PARTITION `p0` VALUES LESS THAN (2020)  (SUBPARTITION `s200`  ,SUBPARTITION `s201`  ,SUBPARTITION `s202`  ,SUBPARTITION `s203`  ))Time: 0.057salter table t_logADD PARTITION (PARTITION `p1` VALUES LESS THAN (2021)(SUBPARTITION `s210` ENGINE = InnoDB,  SUBPARTITION `s211` ENGINE = InnoDB,  SUBPARTITION `s212` ENGINE = InnoDB,  SUBPARTITION `s213` ENGINE = InnoDB))Time: 0.054s