Modyfikowanie zapytania łączenia krzyżowego

Question

Mam to zapytanie, które znalazłem, że chcę zmodyfikować, aby uzyskać dodatkową kolumnę, a także zsumować ostatnie 3 miesiące znalezionych kwot. Chcę za to sporządzić raport Crystal. Zapytanie poniżej.

SELECT 
    dbo.[@EIM_PROCESS_DATA].U_Tax_year, 
    dbo.[@EIM_PROCESS_DATA].U_Employee_ID, 
    SUM(dbo.[@EIM_PROCESS_DATA].U_Amount) AS PAYE, 
    dbo.OADM.CompnyName, 
    dbo.OADM.CompnyAddr, 
    dbo.OADM.TaxIdNum, 
    dbo.OHEM.lastName + ', ' + ISNULL(dbo.OHEM.middleName, '') + ' ' + 
     ISNULL(dbo.OHEM.firstName, '') AS EmployeeName, dbo.OHEM.govID 

FROM dbo.[@EIM_PROCESS_DATA] 
     INNER JOIN dbo.OHEM ON dbo.[@EIM_PROCESS_DATA].U_Employee_ID 
              = dbo.OHEM.empID CROSS JOIN dbo.OADM 
WHERE (dbo.[@EIM_PROCESS_DATA].U_PD_code = 'SYS033') 

GROUP BY 
    dbo.[@EIM_PROCESS_DATA].U_Tax_year, 
    dbo.[@EIM_PROCESS_DATA].U_Employee_ID, 
    dbo.OADM.CompnyName, 
    dbo.OADM.CompnyAddr, 
    dbo.OADM.TaxIdNum, 
    dbo.OHEM.lastName, 
    dbo.OHEM.firstName, 
    dbo.OHEM.middleName, 
    dbo.OHEM.govID 

tabela OHEM zawiera pole o nazwie U_Process_month alfanumeryczny, który zawiera znaki od stycznia do grudnia. Ponieważ zapytanie jest zgodne z powyższym, SUM(dbo.[@EIM_PROCESS_DATA].U_Amount) podaje sumy dla wszystkich kwot PAYE, ie. U_PD_code = 'SYS033'.

Chciałbym mieć zapytanie, które sumuje ostatnie 3 miesiące (PAYE) w oparciu o wybrany rok i miesiąc.

Chciałbym również pobrać i dodatkową kolumnę, SUM(dbo.[@EIM_PROCESS_DATA].U_Amount) as TAXABLEPAY where (dbo.[@EIM_PROCESS_DATA].U_PD_code = 'SYS034').

Jak to osiągnąć? Każda pomoc doceniona.

Answer 1

Nie byłem pewien, jaki typ danych U_Tax_year był tak zostawiłem to jako INT. Jednak to zapytanie powinno zwrócić 3 miesiące przed ustawionym miesiącem.

DECLARE @start_month DATETIME; 
DECLARE @start_year INT; 

SET @start_month = '2013-04-01'; 
SET @start_year = 2013; 

SELECT dbo.[@EIM_PROCESS_DATA].U_Tax_year 
    , dbo.[@EIM_PROCESS_DATA].U_Employee_ID 
    , SUM(CASE WHEN dbo.[@EIM_PROCESS_DATA].U_PD_code = 'SYS033' THEN dbo.[@EIM_PROCESS_DATA].U_Amount ELSE 0 END) AS PAYE 
    , SUM(CASE WHEN dbo.[@EIM_PROCESS_DATA].U_PD_code = 'SYS034' THEN dbo.[@EIM_PROCESS_DATA].U_Amount ELSE 0 END) AS TAXABLEPAY 
    , dbo.OADM.CompnyName 
    , dbo.OADM.CompnyAddr 
    , dbo.OADM.TaxIdNum 
    , dbo.OHEM.lastName + ', ' + ISNULL(dbo.OHEM.middleName, '') + ' ' + ISNULL(dbo.OHEM.firstName, '') AS EmployeeName 
    , dbo.OHEM.govID 
    FROM dbo.[@EIM_PROCESS_DATA]INNER JOIN dbo.OHEM ON dbo.[@EIM_PROCESS_DATA].U_Employee_ID = dbo.OHEM.empID CROSS JOIN dbo.OADM 
WHERE dbo.[@EIM_PROCESS_DATA].U_PD_code IN ('SYS033', 'SYS034') 
    AND dbo.OHEM.U_Process_month IN (DATENAME(MONTH, DATEADD(MONTH,-3, @start_month)), DATENAME(MONTH, DATEADD(MONTH,-2, @start_month)), DATENAME(MONTH, DATEADD(MONTH,-1, @start_month))) 
    AND dbo.[@EIM_PROCESS_DATA].U_Tax_year = @start_year 
GROUP BY dbo.[@EIM_PROCESS_DATA].U_Tax_year 
    , dbo.[@EIM_PROCESS_DATA].U_Employee_ID 
    , dbo.OADM.CompnyName 
    , dbo.OADM.CompnyAddr 
    , dbo.OADM.TaxIdNum 
    , dbo.OHEM.lastName 
    , dbo.OHEM.firstName 
    , dbo.OHEM.middleName 
    , dbo.OHEM.govID; 

Answer 2

 
-- You can sum up columns based on filters by using a case 
SUM(CASE WHEN U_PD_code = 'SYS033' THEN dbo.[@EIM_PROCESS_DATA].U_Amount 
      ELSE 0) AS PAYE, 
SUM(CASE WHEN U_PD_code = 'SYS034' THEN dbo.[@EIM_PROCESS_DATA].U_Amount 
      ELSE 0) AS PAYE2, 

-- Obviously your WHERE becomes 
WHERE (dbo.[@EIM_PROCESS_DATA].U_PD_code IN ('SYS033','SYS034')) 

-- Your month year fitler can be added to your where like this.. 
-- You can convert month to a date and then use BETWEEN a month parameeter, and 2 months back (3 months total) 
-- Note I assumed month name for your param, change to number if needed. You gave no info on year so I assumed it was as shown. 
AND MONTH(U_Process_month + ' 1 2010') BETWEEN MONTH(@YourMonth + ' 1 2010') AND MONTH(@YourMonth + ' 1 2010') - 2 
AND dbo.[@EIM_PROCESS_DATA].U_Tax_year = @YourYear