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A good candidate for a primary key has several characteristics.
一个好的主键候选具有几个特征。
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One can compute a key only. The other could find out all candidate keys.
算法一可计算出一个候选码，算法二可计算出全部候选码。
youdao
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One can compute a key only. The other could find out all candidate keys.
算法一可计算出一个候选码，算法二可计算出全部候选码。
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