sql server 判斷是否存在數據庫，表，列，視圖
1 判斷數據庫是否存在
if exists (select * from sys.databases where name = ‘數據庫名’)
drop database [數據庫名]
2 判斷表是否存在
if exists (select * from sysobjects where id = object_id(N’[表名]’) and OBJECTPROPERTY(id, N’IsUserTable’) = 1)
drop table [表名]
3 判斷存儲過程是否存在
if exists (select * from sysobjects where id = object_id(N’[存儲過程名]’) and OBJECTPROPERTY(id, N’IsProcedure’) = 1)
drop procedure [存儲過程名]
4 判斷臨時表是否存在
if object_id(‘tempdb..#臨時表名’) is not null
drop table #臨時表名
5 判斷視圖是否存在
–判斷是否存在’MyView52’這個試圖
IF EXISTS (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_NAME = N’MyView52’)
PRINT ‘存在’
else
PRINT ‘不存在’
6 判斷函數是否存在
– 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’))
drop function [dbo].[函數名]
7 獲取用戶創建的對象信息
SELECT [name],[id],crdate FROM sysobjects where xtype=’U’
8 判斷列是否存在
if exists(select * from syscolumns where id=object_id(‘表名’) and name=’列名’)
alter table 表名 drop column 列名
9 判斷列是否自增列
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 判斷表中是否存在索引
if exists(select * from sysindexes where id=object_id(‘表名’) and name=’索引名’)
print ‘存在’
else
print ‘不存在’
刪除索引 drop index 表名.索引名
或: drop index 索引名 on 表名(貌似2000不行)
11 查看數據庫中對象
SELECT * FROM sys.sysobjects WHERE name=’對象名’ SELECT * FROM sys.sysobjects WHERE name=’對象名’