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在一个BDNF关系模式中,所有的非主属性对每一个码都是()

单选题
2022-01-02 03:04
A、部分函数依赖
B、平凡函数依赖
C、传递函数依赖
D、完全函数依赖
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正确答案
D

试题解析

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