abstract：经过本章节学习对数据表的分类有了基本的掌握
经过本章节学习对数据表的分类有了基本的掌握
Correcting teacher：查无此人Correction time：2019-05-07 09:40:55
Teacher's summary：做的不错。多表关系，就是一对多。 一条数据，对应多条数据。 要多表创建。继续加油。
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