今天以前的同学问我关于这方面的SQL语句，我特意记忆一下，毕竟这个也比较常见了 复制代码 代码如下: select * from (select * from member_payment order by id desc) t group by member_id limit 10 第一种是
今天以前的同学问我关于这方面的SQL语句，我特意记忆一下，毕竟这个也比较常见了复制代码 代码如下:select * from (select * from member_payment order by id desc) t group by member_id limit 10第一种是先排序，然后group，这样的话自然可以取到最适合的一条数据。缺点很明显：Using temporary; Using filesort复制代码 代码如下:select s.* from (SELECT max(id) as id FROM `member_payment` group by `member_id` limit 10) t left join `member_payment` as s on t.id=s.id 第二种是联合查询 复制代码 代码如下:select * from `member_payment` where EXISTS ( select `id` from ( SELECT max(`id`) as id FROM `member_payment` group by `member_id` limit 10) t where t.`id`=`member_payment`.`id`)第三种是子查询窃以为第二种效率最高
