-- 获得存储过程创建语句select o.xtype,o.name,cm.text from syscomments cm inner join sysobjects o on o.id=cm.id where xtype ='p'order by o.xtype,o.name,cm.text-- 获得视图程创建语句select o.xtype,o.name,cm.text from syscomments cm inner join sysobjects o on o.id=cm.id where xtype ='v'order by o.xtype,o.name,cm.text-- 查询所有表名、字段名、类型、长度select o.name, c.name,t.name,c.length from syscolumns cinner join systypes t on c.xtype= t.xtypeinner join sysobjects o on c.id= o.idwhere o.xtype='u' order by o.name, c.name,t.name-- 所有数据都来自于这四张表--select * from sysobjects --select * from syscolumns--select * from syscomments--select * from systypes
--列出数据库里所有的表名 SELECT nameFROM sysobjectsWHERE type = 'U '--列出表里的所有的列名 SELECT nameFROM syscolumnsWHERE id = OBJECT_ID('TableName ')
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' /* xtype 的表示参数类型，通常包括如下这些 C = CHECK 约束 D = 默认值或 DEFAULT 约束 F = FOREIGN KEY 约束 L = 日志 FN = 标量函数 IF = 内嵌表函数 P = 存储过程 PK = PRIMARY KEY 约束（类型是 K） RF = 复制筛选存储过程 S = 系统表 TF = 表函数 TR = 触发器 U = 用户表 UQ = UNIQUE 约束（类型是 K） V = 视图 X = 扩展存储过程 */ 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'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'