Question

我有一个关于在MS Access 2010中创建运行总计的问题，类似于此处的运行总计：

Access 2010 - query showing running total for multiple records, dropping old record and adding new record on each line

然而，当我从该线程输入等效代码时，我收到一条错误，指出无法找到数据库（Access似乎认为我指定的表是数据库名称）

以下是原始帖子的代码： -

SELECT hbep1.EmployeeID, hbep1.PayPeriodID, 
    (
    SELECT Sum(hbep2.HoursUsed) 
    FROM Hours_by_Empl_PP hbep2
    WHERE hbep2.EmployeeID=hbep1.EmployeeID 
        AND (hbep2.PayPeriodID Between hbep1.[PayPeriodID]-3 
        And hbep1.[PayPeriodID])
    ) AS Sum_of_Hours_last_4_PPs
FROM Hours_by_Empl_PP hbep1;

以下是我输入查询的代码： -

SELECT 
    V4_Try.ID_NIS_INV_HDR,
    V4_Try.ID_ITM, 
    V4_Try.RunTot3, 
    V4_Try.BomVsActQty,
    DMin("RunTot3","V4_Try","[ID_Itm]=" & [ID_ITM]) AS IDItmMin,  
    DMax("RunTot3","V4_Try","[ID_Itm]=" & [ID_ITM]) AS IDItmMax, 
    (
       SELECT Sum([V4_Try].[BomVsActQty])
       FROM [V4_Try].[BomVsActQty]
       WHERE [V4_Try].[ID_ITM]=[V4_Try].[ID_ITM]
           AND (IDItmMax < IDItmMin) 
    ) AS RunTot6
FROM V4_Try
ORDER BY V4_Try.ID_ITM, V4_Try.RunTot3;

Answer 1

我注意到的一件事是主查询使用DMax()和DMin()来创建一些别名列

...
DMin("RunTot3","V4_Try","[ID_Itm]=" & [ID_ITM]) AS IDItmMin,  
DMax("RunTot3","V4_Try","[ID_Itm]=" & [ID_ITM]) AS IDItmMax,
...

然后子查询尝试在其WHERE子句中使用这些别名

(
   SELECT ...
   WHERE...
       AND (IDItmMax < IDItmMin) 
) AS RunTot6

我很确定子查询不会知道“父”查询中的列别名，因此它们可能是无法识别的项目。

Answer 2

首先运行此查询：

SELECT * FROM V4_Try;

然后开发复杂性。在其他任何事情之前构建嵌套查询。当您知道运行时，请尝试添加别名，然后添加DMax()函数，依此类推。隔离弹出错误的点。

这是修复查询的过程。

哦，请指定Access引发的确切错误。此外，如果这是从VBA运行，请告诉我们，因为这会影响您的故障排除。

“运行总计的SQL代码”无法识别表名

2 个答案: