Question

我正在为我公司的Access DB工作，我有一个包含这些列的表：

共同名称项目 - 名称日期1日期2日期3日期4日期5日期6日期7日期8付款1付款2付款3付款4付款5付款6付款7付款8付款1代理商Deatil3代理商Deatil4代理商Deatil6代表Deatil7 Deatil8

我想设计一个包含以下列的查询：

日期（用户可以输入范围） SUM [此期间的付款总和] 共同的名字项目名称

任何人都可以在此查询中帮助我吗？

Answer 1

您的问题的答案是规范化。您当前的设置不会以任何可能的方式帮助您。相当复杂。

您应该拥有行，而不是拥有列。所以TOTALS查询可以发挥它的魔力。设置应该是，

Co-Name |   Project-Name    |   DateOfPay   |   Payment |   Details

而不是设置这个，

Co-Name |   ProjName    |   Date1   |   Payment1|   Detail1 |   Date2   |   Payment2|   Detail2 |   Date3   |   Payment3|   Detail3
--------+---------------+-----------+-----------+-----------+-----------+-----------+-----------+-----------+-----------+-------------
AAA     |   X-1         |22/05/2014 |   £ 500   |   First   |27/07/2014 |   £ 100   |   Second  |           |           |   
BBB     |   Y-1         |02/08/2014 |   £ 300   |   First   |15/09/2014 |   £ 250   |   Second  |24/10/2014 |   £ 400   |   Third   
CCC     |   X-1         |07/11/2014 |   £ 100   |   First   |           |           |           |           |           |

您应该将设置设为，

Co-Name |   Project-Name    |   DateOfPay   |   Payment |   Details
--------+-------------------+---------------+-----------+-------------
AAA     |   X-1             |   22/05/2014  |   £ 500   |   First
AAA     |   X-1             |   27/07/2014  |   £ 100   |   Second
BBB     |   Y-1             |   02/08/2014  |   £ 300   |   First
BBB     |   Y-1             |   15/09/2014  |   £ 250   |   Second
BBB     |   Y-1             |   24/10/2014  |   £ 400   |   Third
CCC     |   Z-1             |   07/11/2014  |   £ 100   |   First

这样，您的代码就像

一样简单

SELECT 
    [Co-Name], 
    [Project-Name], 
    Sum(Payment) As TotalPaid
FROM
    theProperTable
WHERE
    DateOfPay BETWEEN [EnterTheStartDate:] And [EnterTheEndDate:]
GROUP BY 
    [Co-Name],
    [Project-Name]

Answer 2

如果您无法更改表格的结构，可以通过创建一个返回＆＃34;标准化＆＃34;的查询来伪造它。表格的版本。将此SQL保存为名为ProjectsNormalized：

的查询

    (SELECT [Co-Name], [Project-Name], Date1 As DateOfPay, Payment1 As Payment, Detail1 As Details FROM Projects WHERE Date1 Is Not Null;)
        UNION ALL
    (SELECT [Co-Name], [Project-Name], Date2 As DateOfPay, Payment2 As Payment, Detail2 As Details FROM Projects WHERE Date2 Is Not Null;)
        UNION ALL
    (SELECT [Co-Name], [Project-Name], Date3 As DateOfPay, Payment3 As Payment, Detail3 As Details FROM Projects WHERE Date3 Is Not Null;)
        UNION ALL 
    (SELECT [Co-Name], [Project-Name], Date4 As DateOfPay, Payment4 As Payment, Detail4 As Details FROM Projects WHERE Date4 Is Not Null;);

如果项目包含此数据：

enter image description here

然后ProjectsNormalized将为您提供此数据：

enter image description here

现在你可以对ProjectsNormalized进行查询，就像它是一个表一样。

注意：使用UNION ALL而不仅仅是UNION很重要，因为UNION会丢弃重复记录。如果您在同一天有两个相同的付款并且具有相同的详细信息，则您希望报告它们。

如何使用ms访问查询在一行中获取多个列值

2 个答案: