SQL Server 清空或删除所有数据库表中的数据
方法一:
--生成数据库脚本的方法最快,处理的也最好
sql2000企业管理器
--右键要清理的数据库
--所有任务
--生成SQL脚本
--<常规>里选择"生成全部对象脚本"","在脚本文件中包含说明性标题"选上
--<设置格式>里,将"包含扩展属性",选上
--<选项>中,将"表脚本选项"中的内容全部选择上
--<选项>中,全选
--其他所有的选项保持默认值
--然后确定,将其保存成一个.sql文件
然后断开对对要清空数据库的连接,查询分析器中执行上面的sql文件就可以了.
方法二:
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--Use 数据库名称
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use databasename
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--第一部分,生成建立外键的语句保存到#tmp
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declare @name varchar(200),@tmp1 varchar(500),@tmp2 varchar(500)
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create table #tmp
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(
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string varchar(8000)
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)
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SELECT 表名称=object_name(b.fkeyid)
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,外键名称=a.name
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,引用的列名=(SELECT name FROM syscolumns WHERE colid=b.fkey AND id=b.fkeyid)
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,引用的表名=object_name(b.rkeyid)
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,已引用的列名=(SELECT name FROM syscolumns WHERE colid=b.rkey AND id=b.rkeyid)
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into #t FROM sysobjects a
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join sysforeignkeys b on a.id=b.constid
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join sysobjects c on a.parent_obj=c.id
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where a.xtype='f' AND c.xtype='U'
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declare cur_test cursor for
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select a.name from sysobjects a join sysobjects c on a.parent_obj=c.id where a.xtype='f' and c.xtype='U'
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open cur_test
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FETCH NEXT FROM cur_test INTO @name
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WHILE (@@fetch_status <> -1)
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BEGIN
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IF (@@fetch_status <> -2)
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BEGIN
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select @tmp1='',@tmp2=''
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select @tmp1=@tmp1+'['+引用的列名+'],',@tmp2=@tmp2+'['+已引用的列名+'],' from #t where 外键名称=@name
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insert into #tmp select top 1 'ALTER TABLE [DBO].['+表名称+'] ADD CONSTRAINT ['+@name+'] FOREIGN KEY ( '+left(@tmp1,len(@tmp1)-1)+' ) REFERENCES ['+引用的表名+'] ( '+left(@tmp2,len(@tmp2)-1)+' )' from #t where 外键名称=@name
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END
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FETCH NEXT FROM cur_test INTO @name
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END
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CLOSE cur_test
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DEALLOCATE cur_test
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drop table #t
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--第二部分,删除所有外键
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DECLARE @STRING VARCHAR(8000)
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WHILE EXISTS(SELECT NAME FROM SYSOBJECTS WHERE TYPE='F')
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BEGIN
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SELECT @STRING='ALTER TABLE '+B.NAME+' DROP CONSTRAINT '+A.NAME+CHAR(13)
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FROM (SELECT PARENT_OBJ,NAME FROM SYSOBJECTS WHERE TYPE='F') A,
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(SELECT ID,NAME FROM SYSOBJECTS WHERE OBJECTPROPERTY(ID, N'ISUSERTABLE') = 1) B
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WHERE A.PARENT_OBJ=B.ID
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EXEC(@STRING)
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END
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--第三部分,删除所有表的记录,并且把identity复位
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exec sp_msforeachtable "truncate table ?"
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--第四部分,执行#tmp里面的建立外键的语句,恢复外键
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declare cur_test2 cursor for select string from #tmp
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open cur_test2
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FETCH NEXT FROM cur_test2 INTO @string
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WHILE (@@fetch_status <> -1)
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BEGIN
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IF (@@fetch_status <> -2)
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BEGIN
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exec(@string)
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PRINT @STRING
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END
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FETCH NEXT FROM cur_test2 INTO @string
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END
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CLOSE cur_test2
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DEALLOCATE cur_test2
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drop table #tmp
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from: http://topic.csdn.net/t/20040615/16/3094555.html#