內置函數和分組在Microsoft Access中不起作用

Question

我想從三個使用Microsoft Access中的內連接的表中進行選擇。在其中一個字段中，我還需要選擇它返回的記錄數。

SELECT Person.FirstName, Person.LastName, Person.Phone, 
Person.Email,Person.Address, Room.RoomNo, Room.Type, Building.Name, 
Floor.Name,count(*) as result 

FROM (Floor INNER JOIN (Building INNER JOIN 
Room ON Building.BuildingID = Room.BuildingID) ON Floor.FloorNo = 
Room.FloorNo) INNER JOIN (Person INNER JOIN Patient ON Person.Username = 
Patient.Username) ON Room.RoomNo = Patient.RoomNo 

WHERE (((Person.FirstName) Like "*" & [Forms]![search]![firstnameKey] & "*") 
AND ((Person.LastName) Like "*" & [Forms]![search]![lastnameKey] & "*")) AND 
(patient.status = 1) 

GROUP BY Patient.username ; 

Answer 1

任何時候你有一個聚合函數，你將不得不group by字段不被計算。從查看您的選擇陳述中，您將返回多個字段，即：Person.Firstname, Person.Lastname等。我相信您將不得不group by這些非聚合字段。

示例代碼：

SELECT Person.FirstName, Person.LastName, Person.Phone, Person.Email, Person.Address, Count(*) as Result <br> 
From Table1 join table 2 -- etc <br> 
WHERE a = b -- etc <BR> 
GROUP BY Person.FirstName, Person.LastName, Person.Phone, Person.Email, Person.Address