Access入门教程8.2表之间的三种关系
在建立表之间的关系前 我们还是要提一下 关系 的三种类型 一对一 一对多 和 多对多 在Access中 可以在两个表之间直接建立 一对一 和 一对多 关系 而 多对多 关系则要通过 一对多 关系来实现 我们分别来说说这三种 关系 首先是 一对一 关系 比如下面的两个表
在建立表之间的关系前
首先是
和某学校学生月助学金
我们降这两个表中的数据进行汇总生成新的表
由于姓名字段可能会出现重复的情况
下面来看看
最后使
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