修改交叉连接查询

Question

我有这个查询，我发现我想修改，以获得额外的列，也总结了发现量的最后3个月。我想为此制作一份Crystal Report。 查询如下。

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 

表OHEM包含一个名为U_Process_month的字母数字字段有汉字是从一月到十二月。由于查询如上，SUM(dbo.[@EIM_PROCESS_DATA].U_Amount)给出了所有PAYE金额的合计，ie. U_PD_code = 'SYS033'。

我想有一个查询，基于所选年份和月份，累计最近3个月（PAYE）。

我也想检索和额外的列，SUM(dbo.[@EIM_PROCESS_DATA].U_Amount) as TAXABLEPAY where (dbo.[@EIM_PROCESS_DATA].U_PD_code = 'SYS034')。

我该如何做到这一点？任何帮助赞赏。

Answer 1

我不确定U_Tax_year是什么数据类型，所以我把它作为INT。但是，此查询应返回您设置的月份之前的3个月。

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