MS-ACCESS / SQL-如何在多种情况下应用where子句

debugcn 发表于 Dev

RC88

SELECT Stock.*
FROM Stock
WHERE (
(
(Stock.ComputerPartNumber) In (SELECT [ComputerPartNumber] FROM [Stock] As Tmp GROUP BY [ComputerPartNumber] HAVING Count(*)=2)
) 
AND 
(
(Stock.EquipmentName)="EquipmentA" Or (Stock.EquipmentName)="EquipmentB")
) 
OR (
(
(Stock.ComputerPartNumber) In (SELECT [ComputerPartNumber] FROM [Stock] As Tmp GROUP BY [ComputerPartNumber] HAVING Count(*)=1)
) 
AND (
(Stock.EquipmentName)="EquipmentA" Or (Stock.EquipmentName)="EquipmentB"
)
);

我正在使用上面的SQL实现以下3个项目：-

找出仅由设备A和/或设备B使用的所有ComputerPartNumber
如果除EquipmentA和EquipmentB以外的设备使用ComputerPartNumber，则筛选出查询结果。
如果EquipmentA和EquipmentC都使用ComputerPartNumber，则还要过滤出结果。

但是，项目3无法成功滤出。我应该怎么做才能达到item3？表和查询快照已附加。提前致谢！

表

询问

苹果核

您需要做的是检查零件在所有设备中的使用总次数是否等于设备A或B使用零件的总次数：

SELECT S.StorageID, S.ComputerPartNumber, S.EquipmentName, S.Result
FROM Stock AS S
WHERE 
(SELECT COUNT(*) FROM Stock AS S1 WHERE S1.ComputerPartNumber=S.ComputerPartNumber)
=(SELECT COUNT(*) FROM Stock AS S2 WHERE S2.ComputerPartNumber=S.ComputerPartNumber AND S2.EquipmentName IN("EquipmentA","EquipmentB"))

问候，

本文收集自互联网，转载请注明来源。

如有侵权，请联系[email protected] 删除。