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declare @begin datetime
declare @End datetime
set @begin=getdate()
   --Ö´ÐеÄÓï¾äдÔÚÕâÀï
set @End=getdate()
select datediff(millisecond,@begin,@End) as Ö´ÐеÄʱ¼ä
--millisecond±íʾºÁÃë Èç¹û¿´Ãë¿ÉÒÔʹÓÃss
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 protected void Page_Load(object sender, EventArgs e)
    {
        Stopwatch watch = new Stopwatch(); //ʵÀý»¯Ò»¸ö¼à¿Ø¶ÔÏó
        watch.Start();  //¿ªÊ¼¼à¿ØÒµÎñÂß¼­
        
        string a = null;
        for (int i = 0; i < 10000; i++)
        {
          a = i.ToString();
        }
        Thread.Sleep(10); //½«Ïß³ÌÑÓ³Ù10ºÁÃë¡£Ò»¸ö¶àÕâÑùµÄ²âÊÔ£¬¶àҪʹÓõ½Ï̷߳½Ãæ
        watch.Stop(); //½áÊø¼à¿Ø
        Response.Write(watch.ElapsedMilliseconds); //Êä³ö¼ÆÊ±½á¹û£¬µ¥Î»£ººÁÃë
    }


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id int identity(1,1),
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Column_name varchar(100),
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