摘要: --去重查询方法一:根据idselect * from sxe where id in(select min(id) from sxe group by username) order by id asc;--去重查询方法二:根据rownumselect * from (select s.*,row... 阅读全文
posted @ 2015-11-18 23:33 ngulc 阅读(513) 评论(0) 推荐(0) 编辑