查询不while循环工作正常(Query not working fine in while loo

我有一个While循环在那里我试图插入。

              DECLARE @CurrentOffer int  =121
        DECLARE @OldestOffer int  = 115
        DECLARE @MinClubcardID bigint=0
              DECLARE @MaxClubcardID bigint=1000
                    WHILE 1 = 1
                        BEGIN
                        INSERT INTO Temp WITH (TABLOCK)
                        SELECT  top (100) clubcard  from TempClub   with (nolock) where ID between 
                        @MinClubcardand and @MaxClubcard

                        declare @sql varchar (8000)
                        while @OldestOffer <= @CurrentOffer
                        begin
                        print @CurrentOffer
                        print @OldestOffer

                                set @sql = 'delete from Temp where Clubcard 
                                 in (select Clubcard from ClubTransaction_'+convert(varchar,@CurrentOffer)+' with (nolock))'
                                 print (@sql)
                                 exec (@sql)

                                SET @CurrentOffer = @CurrentOffer-1  
                                IF @OldestOffer = @CurrentOffer
                                    begin

                                        -- my logic
                                    end

                        end
                    end

我TempClub表始终只与第100条记录检查。 我TempClub表有3000条记录。 我需要检查我所有的会员卡全部3000条记录与ClubTransaction_121，ClubTransaction_120，ClubTransaction_119表。

Answer 1:

该SELECT在第8名只返回前100项查询

SELECT top (100) clubcard from TempClub ...

如果要检索的所有项目，去掉top (100)的语句的一部分

SELECT clubcard from TempClub ...

Answer 2:

为了做到批量式处理，需要将@MinClubcardID设置为最近ID处理加1，并包括一个ORDER BY ID，以确保按顺序返回的记录。

但是...我不会用使用主键为我的“指标”的做法。 什么你要找的是一个基本的分页模式。 在SQL Server 2005 +，微软推出了ROW_NUMBER（）函数，这使得分页轻松了许多。

例如：

 DECLARE @T TABLE (clubcard INT)

 DECLARE @start INT
 SET @start = 0

 WHILE(1=1)
 BEGIN
   INSERT @T (clubcard)
   SELECT TOP 100 clubcard FROM 
   (
      SELECT clubcard,
      ROW_NUMBER() OVER (ORDER BY ID) AS num
      FROM dbo.TempClub
   ) AS t
   WHERE num > @start

  IF(@@ROWCOUNT = 0) BREAK;

  -- update counter
  SET @start = @start + 100

  -- process records found

  -- make sure temp table is empty
  DELETE FROM @T
END

文章来源: Query not working fine in while loop