1、判断数据库是否存在
if exists (select * from sys.databases where name = '数据库名')
drop database [数据库名]
2 判断表是否存在
IF NOT EXISTS ( SELECT *
FROM sysobjects
WHERE id = OBJECT_ID('cb_DBDossierTypeSet')
AND type = 'U' )
。。。。。。
GO
3 判断存储过程是否存在
IF ( SELECT OBJECT_ID('GetUserNameList')
) IS NOT NULL
DROP PROC GetUserNameList
go
4 判断临时表是否存在
if object_id('tempdb..#临时表名') is not null
drop table #临时表名
5 判断视图是否存在
IF EXISTS ( SELECT *
FROM sysobjects
WHERE id = OBJECT_ID('vcb_DBZhJsIndex')
AND type = 'V' )
DROP VIEW vcb_DBZhJsIndex
GO
6 判断函数是否存在
-- 判断要创建的函数名是否存在
IF ( SELECT OBJECT_ID('[fn_bbb]')
) IS NOT NULL
DROP FUNCTION [fn_bbb]
go
7 获取用户创建的对象信息
SELECT [name],[id],crdate FROM sysobjects where xtype='U'
8 判断列是否存在
IF not EXISTS ( SELECT *
FROM syscolumns
WHERE id = OBJECT_ID('cb_Product')
AND name = 'ProductLevel' )
ALTER TABLE [cb_Product] ADD [ProductLevel] [varchar] (50) ;
GO
9 判断列是否自增列
if columnproperty(object_id('table'),'col','IsIdentity')=1
print '自增列'
else
print '不是自增列'
SELECT * FROM sys.columns WHERE object_id=OBJECT_ID('表名') AND is_identity=1
10 判断表中是否存在索引
if exists(select * from sysindexes where id=object_id('表名') and name='索引名')
print '存在'
else
print '不存在'
11 查看数据库中对象
SELECT * FROM sys.sysobjects WHERE name='对象名' SELECT * FROM sys.sysobjects WHERE name='对象名'