Leung文

摘要：使用exists：if exists(select 1 from Table1 where Name = 'xxx') {} else {}把NULL排在后面：order by isnull(beginTime), beginTime 阅读全文

posted @ 2013-09-01 00:14 Leung文阅读(112) 评论(0) 推荐(0) 编辑