-- SQL SERVER 判断是否存在某个触发器.储存过程 -- 判断储存过程,如果存在则删除IF (EXISTS(SELECT * FROM sysobjects WHERE name='procedurename' AND type='P')) DROP PROCEDURE procedurename -- 判断触发器,如果存在则删除IF (EXISTS(SELECT * FROM sysobjects WHERE id=object_id(N'[dbo].[triggername]')
use 数据库名(是要删除表的所在的那个数据库的名称) GO ) begin SELECT @sql='drop table ' + name FROM sysobjects WHERE (type = 'U') ORDER BY 'drop table ' + name exec(@sql) end-----------------------------------------------use 数据库一定要填对哦......
Messages表: mysql>create table Messages( ->message_id int auto_increment primary key, ->user_name varchar(50) not null, ->author_id int not null, ->body text, ->forum_id int not null); Forums表: mysql>create table Forums( ->forum_id