判断数据库中要创建的存储过程、函数等是否已经存在

1.判断要创建的表是否已经存在

if exists (select  * from sysobjects where id=OBJECT_ID(N'[dbo].[GetNdemoApplyDetail]')
and  OBJECTPROPERTY(id,N'IsUserTable')=1)

2.判断要创建的存储过程是否已经存在

if exists (select  * from sysobjects where id=OBJECT_ID(N'[dbo].[存储过程名称]')
and  OBJECTPROPERTY(id,N'IsProcedure')=1)

drop procedure [dbo].[存储过程名称]

3.判断要创建的视图是否已经存在

if exists (select  * from sysobjects where id=OBJECT_ID(N'[dbo].[视图名称]')
and  OBJECTPROPERTY(id,N'IsVIew')=1)

drop View [dbo].[视图名称]

4.判断要创建的函数是否已经存在

if exists (select  * from sysobjects where id=OBJECT_ID(N'[dbo].[GetNdemoApplyDetail]')
and  xtype in (N'FN',N'IF',N'TF'))
drop function [dbo].[函数名称]

go

if col_length('表名','列名') is null

print '不存在'

select 1 from sysobjects where id in (select id from syscolumns where name='列名') 
and name='表名'