更深一步排重

1 select 重复列,时间列,其余列 
2 inner join (select 重复列,max(时间列) as 时间列 from 表 group by 重复列) AS T2
3 on t1.重复列=t2.重复列 and t1.时间列 =t2.时间列
4 from 表 AS T1
原文地址:https://www.cnblogs.com/myblogslh/p/4655869.html