题目
题目

MANAGEMENT INFORMATION SYSTEMS CIS 3010-16 (93684) Exam Two

单项选择题

What is a foreign key?  

选项
A.A field (or group of fields) that uniquely identifies a given entity in a table.
B.A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship among the two tables.
C.Characteristics or properties of an entity.
D.A field (or group of fields) that uniquely identifies a given attribute in a table.
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思路分析
Question: What is a foreign key? Option 1: 'A field (or group of fields) that uniquely identifies a given entity in a table.' This describes a primary key, not a foreign key. It specifies uniqueness within a single table but does not address cross-table relationships. Option 2: 'A......Login to view full explanation

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