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判断题 Entity refers to something that exists objectively in the real world. Conceptual things cannot be called entities

A. 正确

B. 错误

数据库原理与应用(Database Theory and Application)课程封面

学科：数据库原理与应用(Database Theory and Application)

时间：2023-11-19 06:58:31

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题目1
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Every entity in the entity-set can has different set of attributes
A. 正确B. 错误
题目2
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Relationships can not have attributes
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题目3
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The basis for distinguishing between different entities is NAME
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题目4
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the mapping cardinality of entity-sets students and courses is one-to-many mapping
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题目5
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Entity refers to something that exists objectively in the real world. Conceptual things cannot be called entities
A. 正确B. 错误
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