从SUM中减去第二个MIN值

Question

我想做的是：

SELECT
    RaceResults.IdPilot,
    SUM(RaceResults.Score)-MIN(RaceResults.Score)-MIN2(RaceResults.Score) AS TotalScore
FROM RaceResults
GROUP BY RaceResults.IdPilot

如何从分数列中获得第二个最小值（上述代码中的MIN2）？

Answer 1

您可以使用基于窗口函数Row_Number（）

的条件求和（）

示例

Declare @YourTable Table ([IdPilot] int,[Score] int)
Insert Into @YourTable Values 
 (1,15)
,(1,15)
,(1,20)
,(1,50)   -- The sum of example is 100 and the bottom 2 equal 30


Select A.IdPilot
      ,TotalScore = sum(Score)-sum(case when rn<=2 then Score end)
 From (
        Select *
              ,RN = Row_Number() over (Partition By idPilot Order by Score)
         From  @YourTable
      ) A
 Group By A.IdPilot

<强>返回

IdPilot   TotalScore
1         70