2017年4月18日
sql 去掉重复保留一个
摘要： SET ROWCOUNT 1WHILE 1=1BEGIN DELETE FROM [dbo].[Demo] WHERE [Id] IN ( select d1.Id from [Demo] d1 where exists (select 1 from [Demo] d2 where d1.[EId] 阅读全文
posted @ 2017-04-18 13:03 mysuper 阅读(251) 评论(0) 推荐(0)