我同时学习数据库(通过存取),编程界面与 db s(通过德尔斐),以及连接两个数据库(通过MS SS SQL)-所以请原谅我在这里出现任何新的混乱.我正在使用教师分级簿作为帮助我学习的榜样。我理解学生及其分级之间的关系是多方面的。我可以设置基础表格和关系,我可以查询基础数据库。
我无法理解的是,如何显示/报告学生和年级,例如,在行中电子表格学生、列中任务、单元格中分数时,如何以通常的方式显示/报告学生和年级。 加上一个加点,即任务随着课程的继续而增加;在规划数据库字段时,人们并不了解所有任务。
一种解决办法可能相当于MS spivot 表格概念。 这是否很容易用德尔菲(Delphi ) 来完成? 是否有更简单的替代方案? (也许可以用学生姓名和个别分配名称的字段单列一张表格? )
打开访问, 从查询向导中创建一个新查询, 然后选择 Crosstab 查询向导 。 此努力应该有助于您理解访问轴查询能力; 访问中不存在连接为连接 < em> 可 < / em > 的东西。 找出您需要的访问查询, 然后从 Delphi 中找出如何打开访问查询 。 目前您的问题是访问, Delphi 问题只是附带的 。
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