Home Database Mysql Tutorial SQL Server批量替换所有表中内容sql语句

SQL Server批量替换所有表中内容sql语句

Jun 07, 2016 pm 05:49 PM
sql Batch replacement

像以前做asp的朋友经常会发现自己的数据库所有的内容给插入了一些代码,如果要一个个表一个个记录去删除,太麻烦了,下面我在在网上找到一个可以批量删除的方法,实际上是批量把那段恶意代码替换,非常快速

代码如下:

 代码如下 复制代码

declare @t varchar(255),@c varchar(255)
declare table_cursor cursor for select a.name,b.name
from sysobjects a,syscolumns b ,systypes c
where a.id=b.id and a.xtype='u' and c.name /*“u”为你要操作的数据类型,不改为全部数据类型,不想麻烦就不用修改了*/
in ('char', 'nchar', 'nvarchar', 'varchar','text','ntext' /* --这里如果你的text(ntext)类型没有超过8000(4000)长度,才可以使用*/)
declare @str varchar(500),@str2 varchar(500)
set @str=' ' /*这里是你要替换的字符*/
set @str2='' /*替换后的字符*/
open table_cursor
fetch next from table_cursor
into @t,@c while(@@fetch_status=0)
begin exec('update [' + @t + '] set [' + @c + ']=replace(cast([' + @c + '] as varchar(8000)),'''+@str+''','''+ @str2 +''')')
fetch next from table_cursor
into @t,@c end close table_cursor deallocate table_cursor;


在SQL Server的查询分析器执行上面的代码,不需要在查看哪个表,哪个字断被注入了,可以很快删除被注入的字段,非常

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