SQL注入批量更新语句

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--sql 2000解决方法
DECLARE @fieldtype sysname
SET @fieldtype='varchar'

--删除处理
DECLARE hCForEach CURSOR GLOBAL
FOR
SELECT N'update '+QUOTENAME(o.name)+N' set '+ QUOTENAME(c.name) + N' = replace(' + QUOTENAME(c.name) + ',''<script_src=http://ucmal.com/0.js> </script>'','''')'
FROM sysobjects o,syscolumns c,systypes t
WHERE o.id=c.id
    AND OBJECTPROPERTY(o.id,N'IsUserTable')=1
    AND c.xusertype=t.xusertype
    AND t.name=@fieldtype
EXEC sp_MSforeach_Worker @command1=N'?'

--sql 2005 解决方法
declare @t varchar(255),@c varchar(255)
declare table_cursor cursor for
select a.name,b.name from sysobjects a,syscolumns b
where a.iD=b.iD AnD a.xtype='u'
AnD (b.xtype=99 or b.xtype=35 or b.xtype=231 or b.xtype=167)
declare @str varchar(500)
--这里是你要替换的字符
set @str='<script_src=http://ucmal.com/0.js> </script>'
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+''','''')')
    fetch next from table_cursor into @t,@c
end
close table_cursor deallocate table_cursor