SQL Group由派生表引起的问题

Question

我试图创建一张包含为员工支付的所有最新款项的表格。原始表格包括自员工开始以来向员工支付的所有款项。我创建了一个派生表，只给我带有最新日期的记录。

我仍然有一些重复的付款日期是相同的，在这种情况下，我想将这些付款一起添加，以便它们显示在一行上。

以下是我的工作代码;

SELECT        T1.EmployeeCode
    , T2.Staff_Number
    , T2.Firstname + ' ' + T2.Surname   AS Name
    , T1.PaymentDate
    , T1.p1
    , T1.p2
    , T1.p3
    FROM DB1.dbo.PARTIFPSNI AS T1




--This section is supposed to return only the latest date 

INNER JOIN (
            SELECT EmployeeCode, MAX(PaymentDate) as MaxDate
            FROM DB1.dbo.PARTIFPSNI
            GROUP BY EmployeeCode               
        )   T1A ON T1.EmployeeCode = T1A.EmployeeCode and T1.PaymentDate = T1A.MaxDate



LEFT JOIN DB2.dbo.Personnel_Records AS T2 ON (T1.EmployeeCode = T2.Staff_Number)

返回以下内容;

我似乎有问题汇总p1，p2＆amp; P3。我想这是因为我试图使用GROUP BY函数两次。

Answer 1

SELECT  T1.EmployeeCode ,
        T2.Staff_Number ,
        T2.Firstname + ' ' + T2.Surname AS Name ,
        T1.PaymentDate ,
        SUM(T1.p1) ,
        SUM(T1.p2) ,
        SUM(T1.p3)
FROM    DB1.dbo.PARTIFPSNI AS T1
        INNER JOIN ( SELECT EmployeeCode ,
                            MAX(PaymentDate) AS MaxDate
                     FROM   DB1.dbo.PARTIFPSNI
                     GROUP BY EmployeeCode
                   ) T1A ON T1.EmployeeCode = T1A.EmployeeCode
                            AND T1.PaymentDate = T1A.MaxDate
        LEFT JOIN DB2.dbo.Personnel_Records AS T2 ON ( T1.EmployeeCode = T2.Staff_Number )
GROUP BY T1.EmployeeCode ,
        T2.Staff_Number ,
        T2.Firstname + ' ' + T2.Surname ,
        T1.PaymentDate