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我试图用这个 Excel 字段模拟 MS-Excel 公式：A - StudyYears B - Inflation_Adjusted_Expenditures C - AnnualContribution D - ContributionIncrease E - InterestIncome F - RunningBalance

当前 Excel 光标位置：列 - F，行 - 3 公式：F2+E2+C2+B2

到 MS-Access sql 查询。从不同表中获取的字段。但是字段 RunningBalance 最初取自表 tblParameter 字段 StartingBalance。此查询的下一个 RunningBalance 记录应该是从上一个记录中添加四个字段。

由于循环引用是 sql 查询中的一个问题，我尝试创建一个这样的函数。

'*************************************************************
' FUNCTION: PREV_RUNNINGBALANCE()
' PURPOSE: Retrieve a value from a field in the previous record.
' PARAMETERS:
'    StartingBalance    - Starting Running Balance which is given
'    RefValue           - ID value
' RETURN: The computed value for the 4 field mention located in the
'          previous record.
' EXAMPLE:
'    =Prev_RunningBalance(StudyYears, 404585)
'**************************************************************
Function Prev_RunningBalance(RefValue As Long, StartingBalance As Long)

Dim dbs As DAO.Database
Dim rsSQL As DAO.Recordset
Dim strSQL As String
Dim vRunningBalance As Integer

On Error GoTo Err_PrevRecVal
    strSQL = "Select Inflation_Adjusted_Expenditures, AnnualContribution, InterestIncome, RunningBalance FROM GenerateFundingPlanData WHERE StudyYears = " & RefValue

Set dbs = CurrentDb
Set rsSQL = db.OpenRecordset(strSQL, dbOpenDynaset)

rsSQL.FindFirst "StudyYears = " & RefValue

If Not rsSQL.NoMatch Then
    'Return 0
    Prev_RunningBalance = 0
End If

If rsSQL.BOF Then
    Prev_RunningBalance = 0
    'Prev_RunningBalance = rsSQL![Inflation_Adjusted_Expenditures] + rsSQL![AnnualContribution] + rsSQL![InterestIncome] + StartingBalance
End If

Do While Not rsSQL.BOF
    ' Move to the previous record.
    rsSQL.MovePrevious
    ' Sum the fields to get the RunningBalance
    ' RunningBalance = Inflation_Adjusted_Expenditures + AnnualContribution + InterestIncome + CurrentRunningBalance
    Prev_RunningBalance = rsSQL![Inflation_Adjusted_Expenditures] + rsSQL![AnnualContribution] + rsSQL![InterestIncome] + rsSQL![RunningBalance]
Loop

'Close Connection
rsSQL.Close

Bye_PrevRecVal:
    Set rsSQL = Nothing    'Deassign all objects.
    Set dbs = Nothing
Exit Function
   Err_PrevRecVal:
Resume Bye_PrevRecVal
End Function

尝试该功能后，我得到一个空结果。这是我的查询示例。

SELECT Prev_RunningBalance(a.StudyYears, 404585) as RunningBalance, 
       a.StudyYears FROM AnalysisYears a;

我是否使用了正确的功能？

请指出我。谢谢你。

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1 回答 1

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在我看来，您只需使用 SQL 就可以实现您的目标。考虑样本表 [RevenueByQuarter]：

FiscalYear  RevenueQ1   RevenueQ2   RevenueQ3   RevenueQ4
      2010          7           5           4           6
      2011          8           6           6           5
      2012          6           8           8           9

Access 中的以下 SQL 查询...

SELECT FiscalYear AS FY, 
    RevenueQ1, RevenueQ2, RevenueQ3, RevenueQ4,
    RevenueQ1+RevenueQ2+RevenueQ3+RevenueQ4 AS RevenueFY,
    (SELECT SUM(RevenueQ1+RevenueQ2+RevenueQ3+RevenueQ4) 
     FROM RevenueByQuarter
     WHERE FiscalYear<=rbq.FiscalYear
    ) AS RunningTotal
FROM RevenueByQuarter rbq;

...产生以下结果...

FY    RevenueQ1   RevenueQ2   RevenueQ3   RevenueQ4   RevenueFY   RunningTotal
2010          7           5           4           6          22             22
2011          8           6           6           5          25             47
2012          6           8           8           9          31             78
于 2013-04-13T13:23:10.897 回答