SQL Server 2005的一個查詢計算兩條表

Question

我在SQL Server初學者

我在醫院數據庫三個表

1. PatientFiles
2. OtherServices
3. PatientDeposit

兩個查詢可顯示我的結果

• 查詢一號。顯示PatientFilesID，TotalOtherServices

  SELECT pf.ID AS PatientFileID, SUM(os.Quantum * os.Price) AS TotalOtherServices 
  FROM PatientsFiles pf INNER JOIN OtherServices os ON pf.ID = os.Patient_File_ID 
  WHERE pf.ID = '14' 
  GROUP BY pf.ID 
  

這是事實結果

PatientFileID | TotalOtherServices 
     14    194.00 

• 查詢二號。顯示PatientFilesID，TotalPatientDeposit

  SELECT pd.Patient_File_ID AS PatientFileID, SUM(pd.Deposit) AS TotalPatientDeposit 
  FROM PatientsDeposits pd 
  WHERE pd.Patient_File_ID = '14' 
  GROUP BY pd.Patient_File_ID 
  

這是事實結果

PatientFileID | TotalPatientDeposit 
     14    450.00 

• 我很累混合兩種查詢

  SELECT pf.ID AS PatientFileID, SUM(os.Quantum * os.Price) AS TotalOtherServices, 
  SUM(pd.Deposit) AS TotalPatientDeposit 
  FROM PatientsFiles pf 
  INNER JOIN OtherServices os ON pf.ID = os.Patient_File_ID 
  INNER JOIN PatientsDeposits pd ON pf.ID = pd.Patient_File_ID 
  WHERE pf.ID = '14' 
  GROUP BY pf.ID 
  

這是假的結果

PatientFileID | TotalOtherServices | TotalPatientDeposit 
     14     582.00   1350.00 

謝謝你幫我提前

Answer 1

Select pf.ID as PatientFileID, 
    os.TotalOtherServices, 
    pd.TotalDeposit 
From PatientFiles pf 
    Left Join 
(Select Patient_File_ID as PatientfileID, SUM(os.Quantum * os.Price) AS TotalOtherServices 
    From OtherServices Group By Patient_File_ID) os on pf.PatientFileID = os.PatientFileID 
    Left Join 
(Select Patient_File_ID AS PatientFileID, SUM(Deposit) AS TotalPatientDeposit 
    From PatientsDeposits Group By Patient_File_ID) pd on pf.PatientFileID = pd.PatientFileID 

Answer 2

快速瀏覽，它看起來像值大於預期的3倍。
（194 * 3 = 582,450 * 3 = 1350）。

此外，在您的第二個查詢中，您沒有使用INNER JOIN。

SELECT pf.ID AS PatientFileID, 
SUM(pd.Deposit) AS TotalPatientDeposit 
FROM PatientsFiles pf INNER JOIN PatientsDeposits pd 
ON pf.ID = pd.Patient_File_ID 
WHERE pd.Patient_File_ID = '14' 
GROUP BY pd.Patient_File_ID 

我知道，這不是問題的答案&更多的應當檢查的事情。