case 表達式中的 case 表達式

Question

我正在使用 LIMS 數據庫軟件並試圖為我們的分析師簡化事情。

最初我有這個直接 case 語句，它適用於我們使用的每個“測試”

CASE

WHEN ([Dry Fertilizer].[Phosphorus ICP (< 6.99 Guar)].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.67)) 

THEN -1 ELSE 0

END

另一個

CASE
    WHEN ([Dry Fertilizer].[Phosphorus ICP (10-13.99 Guar)].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.69)) THEN -1
    ELSE 0
END

其目的是查看測試結果[磷]，與已知數字[保證]進行比較，然后計算並輸出“-1”如果低於則失敗或“0”並通過。

現在，我不再對每個“保證”進行不同的測試，而是考慮采用所有這些數字並進行相當大的計算，但是當我嘗試運行計算時，我的軟件就掛了。 我可以做些什么來簡化此代碼或使其工作？ 這是代碼：

CASE    When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =4) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.67)) THEN -1 ELSE 0 End

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =5) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.67)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =6) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.67)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =7) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.68)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =8) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.68)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =9) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.68)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =10) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.69)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =12) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.69)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =14) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.7)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =16) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.7)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =18) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.71)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =20) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.72)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =22) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.72)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =24) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.73)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =26) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.73)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =28) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.74)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =30) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.75)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =32) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.76)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =34) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.794)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =36) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.828)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =38) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.862)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =40) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.896)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =42) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.93)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =44) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.964)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =46) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.998)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =48) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-1.032)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =50) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-1.066)) THEN -1 ELSE 0 End 

When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =52) Then
    Case When ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-1.1)) THEN -1 ELSE 0 End 


End

Answer 1

為什么你需要一個嵌套的 CASE，你可以簡單地使用 AND

 SELECT CASE When ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee] =4) AND ([Dry Fertilizer].[Phosphorus ICP].[Phosphorus] < ([Dry Fertilizer].[Phosphorus Guarantee].[Phosphorus Guarantee]-0.67)) THEN -1 
 WHEN
 WHEN
 WHEN ETC
 ELSE 0 END AS [YOURCOL]