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non-prime attribute
释义
non-prime attribute
网络
非主属性;非码属性
网络释义
1.
非主属性
非主属性
(
Non-Prime attribute
):不包含在任何侯选码中的属性称为非主属性( Non-Prime attribute)或非码属性(Non-key …
blog.csdn.net
2.
非码属性
非码属性
(
Non-Prime Attribute
):不包含在任何候选码中的属性称为非码属性。 2.4.3 外部关系键 如果关系 R2 的一个或一 …
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例句
释义:
非主属性,非码属性
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更新时间:2025/12/2 0:25:54