或者內部Case語句

Question

試圖找出如何將一個或一個case語句的T-SQL

我基本上是檢查兩件事情，如果任一個是真實的，只是把他們看成0爲伯爵。

COUNT(Case When (car[Weight] IS null) then 0 else car.CarKey 
      OR When (car.BinNumber is null) then 0 else car.CarKey 
     End) as Carkey 

也試過，但語法錯誤

COUNT(Case When (car[Weight] IS null) then 0 
     else When (car.BinNumber is null) then 0 
     else car.CarKey 
     End) as Carkey 

Answer 1

您可以使用OR這樣：

COUNT(Case 
     When (car.[Weight] IS null) or (car.BinNumber is null) 
     then 0 
     else car.CarKey End) as Carkey 

Answer 2

你接近你的第二次嘗試，只是刪除一個else

COUNT(Case When (car[Weight] IS null) then 0 
    When (car.BinNumber is null) then 0 
    else car.CarKey 
    End) as Carkey 

注意：如果你想計算沒有空值的項目，那不會。零值仍然是一個值，所以它也會被計數。使用null爲您不想計算項目：

COUNT(Case When (car[Weight] IS null) then null 
    When (car.BinNumber is null) then null 
    else car.CarKey 
    End) as Carkey 

或者使用sum代替：

SUM(Case When (car[Weight] IS null) then 0 
    When (car.BinNumber is null) then 0 
    else 1 
    End) as Carkey