Как объединить 2 таблицы, чтобы вы могли правильно суммировать поля в обеих таблицах

Question

Я соединяю 2 таблицы и суммирую 3 поля, 2 из 1 таблицы и 1 из второго. Однако таблицы имеют несколько записей, и это дает мне неправильные итоги (суммы). Я знаю, что не так, но не знаю, как написать SQL, чтобы получить правильный результат.

В целом итоговые значения удваиваются из-за 2 записей для CCNum 001. Очевидно, что SQL неверен, но что будет правильным SQL?

Не знаю, как будет выглядеть SQL.

SELECT  AETCC.PayPeriodID, EI.ADP_ID, EI.LastName + ', ' 
 + EI.FirstName AS EmpName, AETCC.LocationNum 
 + '-' + AETCC.CostCenterNum AS CostString, 
 AETCC.LocationNum AS Location, AETCC.CostCenterNum AS CostCenter, 
 AllocationType, sum(AD.TotalHoursWorked) as TotalHoursWorked, 
 sum(AD.TotalPercentWorked) as TotalPercentWorked, 
 sum(AETCC.ExpenseAmount) AS ExpAmt
        FROM    dbo.AllocatedExpenseToCostCenter AS AETCC 
        INNER JOIN
            dbo.AllocationData AS AD 
                ON AETCC.ADP_ID = AD.ADP_ID 
                AND AETCC.CostCenterNum = AD.CostCenterNum 
                AND AETCC.LocationNum = AD.LocationNum 
                AND AETCC.PayPeriodID = AD.PayPeriodID 
        INNER JOIN
            dbo.EmployeeInformation AS EI 
                ON AETCC.ADP_ID = EI.ADP_ID
        WHERE        (AETCC.ExpenseAccount = '8000')
--      GROUP BY AETCC.PayPeriodID, EI.ADP_ID, EI.FirstName, EI.LastName,
--      AETCC.LocationNum, AETCC.CostCenterNum
        GROUP BY AETCC.PayPeriodID, AllocationType, AETCC.LocationNum,
        AETCC.CostCenterNum, EI.ADP_ID, EI.FirstName, EI.LastName

Данные в первой таблице:

PayPrd,LocNum,CCNum,ExpAcct,ExpenseAmount,ADP_ID,HoursWorked
1921,024,001,8000,175.2496,2063,0.63
1921,024,001,8000,1810.2617,2063,67.49
1921,024,013,8000,93.3417,2063,0.18

Данные во второй таблице:

PayPrd,LocNum,CCNum,Hours,%,ADP_ID
1921,024,001,7.50,0.0843,2063
1921,024,001,77.50,87.0787,2063
1921,024,013,4.00,0.0449,2063

Текущие результаты:

PayPrd,ADP_ID,EmpName,CostString,LocNum,CCNum,Hours,%,ExpAmt
1921,2063,King; Tom,024-001,024,001,170.00,174,3971.0226
1921,2063,King; Tom,024-013,024,013,4.00,0.4,93.3417

Answer 1

Суммируйте по каждой таблице отдельно, затем объедините результаты.

SELECT  AETCC.PayPeriodID, EI.ADP_ID, EI.LastName + ', ' 
 + EI.FirstName AS EmpName, AETCC.LocationNum 
 + '-' + AETCC.CostCenterNum AS CostString, 
 AETCC.LocationNum AS Location, AETCC.CostCenterNum AS CostCenter, 
 AllocationType, AD.TotalHoursWorked as TotalHoursWorked, 
 AD.TotalPercentWorked as TotalPercentWorked, 
 AETCC.ExpenseAmount AS ExpAmt
      FROM (SELECT PayPeriodID, LocationNum, CostCenterNum, ADP_ID, ExpenseAccount,
              SUM(ExpenseAmount) as ExpenseAmount
            FROM dbo.AllocatedExpenseToCostCenter
            GROUP BY PayPeriodID, LocationNum, CostCenterNum, ADP_ID, ExpenseAccount
           ) AS AETCC 
        INNER JOIN
           (SELECT PayPeriodID, LocationNum, CostCenterNum, ADP_ID,
              SUM(TotalHoursWorked) as TotalHoursWorked,
              SUM(TotalPercentWorked) as TotalPercentWorked
            FROM dbo.AllocationData
            GROUP BY PayPeriodID, LocationNum, CostCenterNum, ADP_ID
           ) AS AD
                ON AETCC.ADP_ID = AD.ADP_ID 
                AND AETCC.CostCenterNum = AD.CostCenterNum 
                AND AETCC.LocationNum = AD.LocationNum 
                AND AETCC.PayPeriodID = AD.PayPeriodID 
        INNER JOIN
            dbo.EmployeeInformation AS EI 
                ON AETCC.ADP_ID = EI.ADP_ID
        WHERE        (AETCC.ExpenseAccount = '8000')

Вы также можете переместить предложение WHERE в подзапрос AETCC.