SQL Server : inserting Player vs Player names in to new table from tblEntrants

Question

我有一个表tblEntrants，它是台球玩家的列表。我想为它们绘制灯具，因此我需要将列表的上半部分复制到 tblFixtures 中，然后将它们与列表的下半部分进行播放。

tblFixtures 有 3 列:player1、player2 和 compID。

这是我到目前为止所拥有的:

INSERT INTO tblFixtures (player1, compID)
    SELECT TOP (50) PERCENT 
        accountID, compID 
    FROM 
        tblEntrants
    WHERE 
        paid = 'y'  AND compID = @compID 
    ORDER BY 
        accountID ASC

INSERT INTO tblFixtures (player2)
    SELECT TOP (50) PERCENT accountID 
    FROM tblEntrants
    WHERE paid = 'y' AND compID = @compID 
    ORDER BY accountID DESC

但这就是这样做的......

Player1   Player 2   CompID
---------------------------
Bob     v null       {Guid}
Bill    v null       {Guid}
Ben     v null       {Guid}
null    v Matt       {Guid}
null    v Mick       {Guid}
null    v Mark       {Guid}

我需要调整上面的代码，将下半部分的玩家添加到上半部分玩家所在的 Player2 列中。像这样..

Player1   Player 2   CompID
---------------------------
Bob     v Matt       {Guid}
Bill    v Mick       {Guid}
Ben     v Mark       {Guid}

感谢任何帮助

Answer 1

INSERT into tblFixtures (player1, compID, player2)
SELECt top1.accountID,compID, least1.accountID
  FROM
    (SELECT accountID, compID , 
            ROW_NUMBER() OVER (ORDER BY accountID) rn
       FROM tblEntrants
      WHERE paid = 'y'  AND compID=@compID) top1,

    (SELECT accountID ,
            ROW_NUMBER() OVER (ORDER BY accountID desc) rn
       FROM tblEntrants
    WHERE paid = 'y'  AND compID=@compID ) least1
WHERE top1.rn = least1.rn
  AND top1.rn <= (select round(count(*)/2,0) from tblEntrants where paid = 'y' and compID=@compID )