SQL 多字段去重 

select articleID from (select aeUID, max(articleID) articleID 
from [article] group by aeUID) a


 concat('123','456'); 合并字符串

 

posted @ 2017-03-15 12:29  LI小白  阅读(4948)  评论(0)  编辑  收藏  举报