Question

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[1]：http://C：\ Documents and Settings \ Administrator \ My Documents \ My Pictures \ Ashampoo Magical Snap 2 \ Magical Snap - 2009.11.16 23.07 - 003.jpg

在参考图片时，有几个条目重复相同的学生ID。如果发生这种情况，我想将在一个学生证下共计任何多个条目所欠的钱合并。我需要在下面的代码中添加什么才能完成此操作？我正在使用Access 2007＆amp;下面的代码是负责生成图片表的SQL视图。 Thnaks，提前帮忙!!!

SELECT Students.[Student ID], Students.[Last Name], Students.[Dorm Addess], [Number of Hours]*[Price Per Hour] AS [Money Owed]
FROM Students INNER JOIN ([Price List and Job Description] INNER JOIN Visits ON [Price List and Job Description].[Job ID] = Visits.[Job ID]) ON Students.[Student ID] = Visits.[Student ID];

Answer 1

好吧，如果我理解你需要一个SUM和GROUP BY来实现这个目标。

像这样的东西

SELECT  Students.[Student ID], 
        Students.[Last Name], 
        Students.[Dorm Addess], 
        SUM([Number of Hours]*[Price Per Hour]) AS [Money Owed]
FROM    Students INNER JOIN 
        ([Price List and Job Description] INNER JOIN 
        Visits ON [Price List and Job Description].[Job ID] = Visits.[Job ID]) ON Students.[Student ID] = Visits.[Student ID]
GROUP BY Students.[Student ID], 
        Students.[Last Name], 
        Students.[Dorm Addess]

Answer 2

intarwebs无法访问您的C：\ Documents and Settings \，没有人看到您的jpeg

SQL中一个ID下的两个或多个值

2 个答案: