英语词汇“Compound key”是什么意思，翻译、用法及简单造句-英汉双解词典-英汉网

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单词	Compound key
释义	Compound key 原声例句 BBC随身英语（官网版） As for carrots, it turns out that it’s the leafy green bits on the top that contain the key compounds beneficial to eyesight, rather than the vegetable itself. 至于胡萝卜，事实证明是顶部的绿叶部分含有对视力有益的关键化合物，而不是蔬菜本身。英语百科 Compound key In database design, a compound key is a key that consists of two or more simple keys that uniquely identify an entity occurrence. A simple key is one that has only one attribute. Compound keys may be composed of other unique simple keys, but may not include another compound key. Each attribute, which makes up a compound key, is also a simple key in its own right.
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