1.第一種情況是 需要將指定的 注入字符串全部替換掉（僅替換注入的字符串為空）
declare @delStr nvarchar(500) set @delStr='<script src=http://www.111cn.net/js/common.js></script>' --這裡被注入的字段串 /****************************************/ /**********以下為操作實體************/ 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)+'條記錄;' end fetch next from cur1 into @columnName end close cur1 deallocate cur1 fetch next from cur into @tableName,@tbID end print '數據庫教程共有'+convert(varchar(10),@iResult)+'條記錄被更新!!!' close cur deallocate cur set nocount off 2.第二種是 需要將注入到表中起始位置到最後都刪掉。（此種方法直接找到注入的起始位置，後面的全部刪掉） --恢復被注入數據庫 --2013-09-26 declare @delStr nvarchar(500) set @delStr='</title><style>.' --被注入的字段串的開始采樣，從此位置後面的數據都為注入數據 /**********以下為操作實體************/ 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)+'條記錄;' end fetch next from cur1 into @columnName end close cur1 deallocate cur1 fetch next from cur into @tableName,@tbID end print '數據庫教程共有'+convert(varchar(10),@iResult)+'條記錄被更新!!!' close cur deallocate cur set nocount off *
