小编典典

MS Access 2010在查询中的运行总计

sql

我不是Access的忠实拥护者,但是对于这个项目,我被要求创建一个Access数据库。我为其他数据库类型创建了类似的东西,所以并不太困难。我大部分都想通了,但总的运行量让我大吃一惊。

我有下表:表名 attendanceView

询问: SELECT * FROM attendanceView

======================================================================================
agentID    |     incurrredDate     |   points    |    OneFallOff     |    TwoFallOff
======================================================================================
chtall     |       10/7/2013       |     2       |       2           |        2
chtall     |       10/15/2013      |     2       |       2           |        2
chtall     |       11/26/2013      |     2       |       2           |        2
chtall     |       12/17/2013      |     2       |       2           |        2
vimunson   |       7/22/2013       |     2       |       2           |        2
vimunson   |       7/29/2013       |     2       |       1           |        1
vimunson   |       12/6/2013       |     1       |       1           |        1

这个查询做的事情需要做,找到值OneFallOffTwoFallOff。但是我需要找到一种方法来TwoFallOff为每个运行总计agentID。例如,chtall有四个记录,如下所示:

==================================================================================================
agentID    |     incurrredDate     |   points    |    OneFallOff     |    TwoFallOff     |   total
==================================================================================================
chtall     |       10/7/2013       |     2       |       2           |        2         |    2
chtall     |       10/15/2013      |     2       |       2           |        2         |    4
chtall     |       11/26/2013      |     2       |       2           |        2         |    6
chtall     |       12/17/2013      |     2       |       2           |        2         |    8
vimunson   |       7/22/2013       |     2       |       2           |        2         |    2
vimunson   |       7/29/2013       |     2       |       1           |        1         |    3
vimunson   |       12/6/2013       |     1       |       1           |        1         |    4

我尝试了DSUM()哪些无效的方法,或者我使用的方法有误。如果表格中的内容不明确,则total当代理更改时,该列将重置为0。


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2021-05-05

共1个答案

小编典典

您可以通过相关子查询获得所需的内容。

SELECT
    a1.agentID,
    a1.incurrredDate,
    a1.points,
    a1.OneFallOff,
    a1.TwoFallOff
    (
        SELECT Sum(a2.TwoFallOff)
        FROM attendanceView AS a2
        WHERE
                a2.agentID = a1.agentID
            AND a2.incurrredDate <= a1.incurrredDate
    ) AS total
FROM attendanceView AS a1;

您也可以使用DSum,但随后需要在 WhereCondition
选项中使用agentID和分隔符。与子查询方法相比,这似乎需要更多的精力,而且我发现它更容易出错。incurrredDate``DSum __

SELECT
    a.agentID,
    a.incurrredDate,
    a.points,
    a.OneFallOff,
    a.TwoFallOff,
    DSum
        (
            "TwoFallOff", "attendanceView",
            "agentID = '" & a.agentID & "' " &
            "AND incurrredDate <= " & 
            Format(a.incurrredDate, "\#yyyy-m-d\#")
        ) AS total
FROM attendanceView AS a;

这两个查询都使用Access 2007中的示例数据返回您请求的结果。

2021-05-05