sqlserver 数据库被注入解有效处理方法

declare @delStr nvarchar(500)
set @delStr='<script src=http://www.111cn.net/js/common.js></script>' --这里被注入的字段串
/****************************************/

/**********以下为操作实体************/
set nocount on

declare @tableName nvarchar(100),@columnName nvarchar(100),@tbID int,@iRow int,@iResult int
declare @sql nvarchar(2000)

set @iResult=0
declare cur cursor for
select name,id from sysobjects where xtype='U'

open cur
fetch next from cur into @tableName,@tbID

while @@fetch_status=0
begin
declare cur1 cursor for
select name from syscolumns where xtype in (231,167,239,175, 35, 99) and id=@tbID
open cur1
fetch next from cur1 into @columnName
while @@fetch_status=0
begin
set @sql='update [' + @tableName + '] set ['+ @columnName +']= SUBSTRING([' + @columnName + '],' + '1, PATINDEX( ''%' + @delStr + '%'', [' + @columnName + '])-1) + ' + 'SUBSTRING([' + @columnName + '], PATINDEX( ''%' + @delStr + '%'', [' + @columnName + ']) + ' + 'len(''' + @delStr + ''') , datalength([' + @columnName + '])) where ['+@columnName+'] like ''%'+@delStr+'%'''

exec sp_executesql @sql
set @iRow=@@rowcount
set @iResult=@iResult+@iRow
if @iRow>0
begin
print '表：'+@tableName+',列:'+@columnName+'被更新'+convert(varchar(10),@iRow)+'条记录;'
end
fetch next from cur1 into @columnName

end
close cur1
deallocate cur1

fetch next from cur into @tableName,@tbID
end
print '数据库教程共有'+convert(varchar(10),@iResult)+'条记录被更新!!!'

close cur
deallocate cur
set nocount off