摘要: 今天碰到这样一个问题:如下图其实很简单,看下面select * from(select *,ROW_NUMBER() over(partition by Course order by Score desc)pm from Person)Tempwhere Temp.pm=2 阅读全文
posted @ 2013-04-12 09:44 程序有Bug 阅读(119) 评论(0) 推荐(0) 编辑