摘要：
这个小问题，搞了好几次，记录一下 SQL SERVEL 合并表之间列：如下所示 合并前： select a.DisplayTime ,count(c.InsertDate) as AppointCount from TempDataNodeTime a left join TableAppointm 阅读全文
摘要：
IF EXISTS(SELECT * FROM sysobjects WHERE id = object_id(N'View_DataNodeByDate') AND OBJECTPROPERTY(id, N'IsView') = 1) DROP View [View_DataNodeByDate] 阅读全文