...严格的规 则: (1)表中任意两个记录在他们的由候选键组成的列 的组合中都不具有相同的值,即唯一性规则(uniqueness property); (2)作为候选键的列的组合中,没有一个列的子集 表现出唯一性,即不可简化性规则(irreducabilitySQL实用简明教程二、关系操...
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You may need to preface the property name with a distinguisher identifiable by the view or action for uniqueness.
考虑到惟一性,您可能需要在属性名前加上一个能够被视图或操作识别的区别符号。
The property is the basic right of lives of economy. After forcefully protected by law, it has the efficacy of domination, priority, uniqueness and recourse.
物权是社会经济生活中最基本的财产权利,当它获得法律的强力保护后即具有了支配性、优先性、排他性、追及性等效力。
Construction insurance, as a kind of property insurance, is quite similar to ordinary property insurance in terms of insurance benefits except for its uniqueness.
工程保险作为财产保险的一种,在保险利益方面与普通财产保险相似,但有其特殊性。
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