表结构如下:
/* SQLyog v10.2 MySQL - 5.5.39 ********************************************************************* */ /*!40101 SET NAMES utf8 */; create table `seal` ( `id` varchar (96), `update_user` varchar (96), `update_time` datetime , `seal_name` varchar (150), `remark` varchar (600), `is_enable` int (1), `seal_image` blob , `seal_version` int (11), `is_del` int (1) ); insert into `seal` (`id`, `update_user`, `update_time`, `seal_name`, `remark`, `is_enable`, `seal_image`, `seal_version`, `is_del`) values(‘91b2b13c47aa4cf7b5faf9093c899cfc‘,‘820e2deb8efe11e4b4a2bcaec5330601‘,‘2015-11-26 15:53:59‘,‘1‘,‘22222‘,‘1‘,‘??,‘1‘,‘1‘); insert into `seal` (`id`, `update_user`, `update_time`, `seal_name`, `remark`, `is_enable`, `seal_image`, `seal_version`, `is_del`) values(‘91b2b13c47aa4cf7b5faf9093c899cfc‘,‘820e2deb8efe11e4b4a2bcaec5330601‘,‘2015-11-26 15:54:49‘,‘1‘,‘1111‘,‘1‘,‘塒NG\r\n\Z\n‘,‘2‘,‘1‘);
对应的mysql如下:
现在的需求是:因为表中用的是联合主键,id+seal_version,所以id可能相同,
要求:求出id一样的数据中,seal_version最大的数据
select * from seal sl left join ( select id,max(seal_version) as seal_version from seal group by id ) temp on sl.id=temp.id and sl.seal_version=temp.version
时间: 2024-11-05 01:42:07