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下列关于关系数据库的说法正确的是

单选题
2021-09-02 00:24
A、关系数据库是有关系的集合构成的
B、关系数据库实质上就是一个二维表
C、关系数据库中的表的每一行为一个属性,反映实体的特征
D、表中的每一列成为元组,即一个记录
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正确答案
A

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