1.第一种情况是 需要将指定的 注入字符串全部替换掉(仅替换注入的字符串为空)
declare @delStr nvarchar(500)
set @delStr=\'<script src=http://www.phpstudy.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
2.第二种是 需要将注入到表中起始位置到最后都删掉。(此种方法直接找到注入的起始位置,后面的全部删掉)
--恢复被注入数据库
--2013-09-26
declare @delStr nvarchar(500)
set @delStr=\'</title><style>.\' --被注入的字段串的开始采样,从此位置后面的数据都为注入数据
/**********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) 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