Question

我已经为我的问题搜索了解决方案，但从我读过的内容来看，我对如何将其纳入我的程序感到困惑。我有一张桌子。我只想获得每个员工的所有最后交易并总结所有这些交易。例如：

|EmployeeID| |Date|             |Amount|
   101        5/5/2014            168.00
   102        5/5/2014            173.00
   101        5/10/2014           300.00
   102        5/11/2014           100.00
   103        5/11/2014           150.00

我需要获得此值：Total: 550.00 我的数据库是MS Access 这是我的代码：

SELECT SUM(SalesmanAcct) As total 
FROM (SELECT LAST(TransactionDate) FROM SalesmanLedger GROUP BY EmployeeID)

Answer 1

我认为你需要Amount

SELECT SUM(Amount) As total 
FROM (SELECT LAST(Amount) FROM SalesmanLedger GROUP BY EmployeeID) as a

Answer 2

您可以尝试以下查询： -

SELECT SUM(AMOUNT)
FROM TABLE1 WHERE in_DATE IN (SELECT to_DATE 
                              FROM (SELECT EmployeeID, MAX(in_Date) AS to_DATE
                                    FROM TABLE1
                                    GROUP BY EmployeeID) TAB1
                             )

获取所有最后的交易并总结所有并在datagridview中查看

2 个答案: