MS Access SQL - 計數記錄數= TRUE

Question

我有什麼看起來相當簡單，但我在這裏失去了一些東西。我試圖顯示所有不同的[業務流程]值，並計算[需要糾正措施] = TRUE的每個[業務流程]的記錄數。可能有一些[業務流程]潛在的零記錄有[解決方法是要求]值= TRUE，或者有可能是值> 0。這是我使用的SQL：

SELECT [Business Process], sum([Corrective Action Is Required]) as [Total Corrective Action Is Required] 

FROM [Review Results] 

WHERE [Corrective Action is Required] in 

(select IIF([Corrective Action Is Required] = TRUE, 1, 0) from [Review Results]) 

GROUP BY [Business Process] 

ORDER BY [Business Process]; 

目前SQL在[需要整個糾正措施]的所有記錄中顯示0值。有人能指出我做得不對嗎？

Answer 1

這樣做會不會更容易？還記得檢查您的基礎數據。

SELECT [Business Process], count([Corrective Action Is Required]) as [Total Corrective Action Is Required] 
FROM [Review Results] 
WHERE [Corrective Action Is Required] = 1 
GROUP BY [Business Process] 
ORDER BY [Business Process]; 

Answer 2

在Access中，真= -1和False = 0，所以怎麼樣：

SELECT [Business Process], 
     Sum(Abs([Corrective Action Is Required])) 
      as [Total Corrective Action Is Required] 
FROM [Review Results] 
GROUP BY [Business Process] 

你不需要排序，當你有分組依據。

Answer 3

可以總結一個布爾值，但在訪問您將得到陰性結果爲真= -1 - 所以這應該工作

SELECT [Business Process], sum(iif([Corrective Action Is Required] = TRUE, 1, 0)) as [Total Corrective Action Is Required] 
FROM [Review Results] 
GROUP BY [Business Process] 
ORDER BY [Business Process]