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" else PRINT "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=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" 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"