-- 庫是否存在if exists(select * from master..sysdatabases where name=N'庫名')print 'exists'elseprint 'not exists'

-- 判斷要創建的表名是否存在if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[表名]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)-- 刪除表drop table [dbo].[表名]GO

--判斷要創建臨時表是否存在If Object_Id('Tempdb.dbo.#Test') Is Not NullBeginprint '存在'EndElseBeginprint '不存在'End

-- 判斷要創建的存儲過程名是否存在if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[存儲過程名]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)-- 刪除存儲過程drop procedure [dbo].[存儲過程名]GO-- 判斷要創建的視圖名是否存在if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[視圖名]') and OBJECTPROPERTY(id, N'IsView') = 1)-- 刪除視圖drop view [dbo].[視圖名]GO-- 判斷要創建的函數名是否存在if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[函數名]') and xtype in (N'FN', N'IF', N'TF'))-- 刪除函數drop function [dbo].[函數名]GOif col_length('表名', '列名') is nullprint '不存在'select 1 from sysobjects where id in (select id from syscolumns where name='列名') and name='表名'