如何判断SQL中是否存在表、存储过程、函数等
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--判断是否存在addOneArticle这个存储过程
if Exists(select name from sysobjects where NAME = 'addOneArticle' and type='P')?
??? drop procedure addOneArticle
--判断是否存在countAr这个触发器
if exists(select * from dbo.sysobjects where id = object_id(N'[dbo].[countAr]') and OBJECTPROPERTY(id, N'IsTrigger') = 1)?
?? drop trigger countAr
--判断是否存在View_1这个视图
IF EXISTS (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_NAME = N'View_1')
??? DROP View View_1
--判断是否存在USER_Fun这个用户函数(注意此处的type 有两种,分别是'TF'-Table-valued Function 表值函数 或'FN'-Scalar-valued Function 标量值函数)
if exists(select * from dbo.sysobjects where id = object_id(N'[dbo].[USER_Fun]') and (type = 'FN' or type = 'TF'))?
??? DROP FUNCTION USER_Fun
--判断表'Tb'是否存在
if (exists (SELECT * FROM dbo.sysobjects where id = object_id(N'Tb')and OBJECTPROPERTY(id, N'IsUserTable') = 1))
DROP TABLE Tb
?
--判断表ABC是否存在
IF OBJECT_ID('ABC','U') IS NOT NULL
DROP Table ABC
