sql server 判断是否存在数据库，表，列，视图

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 exists (select * from sysobjects where id = object_id(N'[表名]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)  --drop table [表名] 3 判断存储过程是否存在if exists (select * from sysobjects where id = object_id(N'[存储过程名]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)  --drop procedure [存储过程名]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 --判断是否存在'MyView52'这个试图IF EXISTS (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_NAME = N'MyView52')PRINT '存在'elsePRINT '不存在'6 判断函数是否存在 --  判断要创建的函数名是否存在      if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[函数名]') and xtype in (N'FN', N'IF', N'TF'))    --drop function [dbo].[函数名] 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 exists(select * from syscolumns where id=object_id('表名') and name='列名')    alter table 表名 drop column 列名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=110 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'删除索引 drop index 表名.索引名 或: drop index 索引名  on 表名(貌似2000不行)11 查看数据库中对象SELECT * FROM sys.sysobjects WHERE name='对象名'  SELECT * FROM sys.sysobjects WHERE name='对象名'