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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）
代码如下:declare @delStr nvarchar(500)
set @delStr='' --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 + '],[' + @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）
代码如下:--恢复被注入数据库
--2013-09-26
declare @delStr nvarchar(500)
set @delStr=' |
