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drop table #Tmp   --ɾ³ýÁÙʱ±í#Tmp
create table #Tmp --´´½¨ÁÙʱ±í#Tmp
(
    ID   int IDENTITY (1,1)     not null, --´´½¨ÁÐID,²¢ÇÒÿ´ÎÐÂÔöÒ»Ìõ¼Ç¼¾Í»á¼Ó1
    WokNo                varchar(50),  
    primary key (ID)      --¶¨ÒåIDΪÁÙʱ±í#TmpµÄÖ÷¼ü     
);
Select * from #Tmp    --²éѯÁÙʱ±íµÄÊý¾Ý
truncate table #Tmp --Çå¿ÕÁÙʱ±íµÄËùÓÐÊý¾ÝºÍÔ¼Êø
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Declare @Wokno Varchar(500) --ÓÃÀ´¼Ç¼ְ¹¤ºÅ
Declare @Str NVarchar(4000) --ÓÃÀ´´æ·Å²éѯÓï¾ä
Declare @Count int --Çó³ö×ܼǼÊý     
Declare @i int
Set @i = 0
Select @Count = Count(Distinct(Wokno)) from #Tmp
While @i < @Count
    Begin
       Set @Str = 'Select top 1 @Wokno = WokNo from #Tmp Where id not in (Select top ' + Str(@i) + 'id from #Tmp)'
       Exec Sp_ExecuteSql @Str,N'@WokNo Varchar(500) OutPut',@WokNo Output
       Select @WokNo,@i --Ò»ÐÐÒ»ÐаÑÖ°¹¤ºÅÏÔʾ³öÀ´
       Set @i = @i + 1
    End
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±¾µØÁÙʱ±íµÄÃû³ÆÇ°ÃæÓÐÒ»¸ö±àºÅ·û (#table_name)£¬¶øÈ«¾ÖÁÙʱ±íµÄÃû³ÆÇ°ÃæÓÐÁ½¸ö±àºÅ·û (##table_name)¡£
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CREATE TABLE #MyTempTable (cola INT PRIMARY KEY)
INSERT INTO #MyTempTable VALUES (1)
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