If an entity has three unique attributes,how many primary keys will its mapped relation have?
A)0
B)1
C)2
D)3

Name: If an entity has three unique attributes,how many primary keys will its mapped relation have? A)0 B)1 C)2 D)3
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Question

Quizplus · Accepted Answer

A primary key is a unique identifier for each record in a relation. Since the entity has three unique attributes, it is possible to have one of these attributes as the primary key for the mapped relation. Therefore, the mapped relation will have one primary key.

If an Entity Has Three Unique Attributes,how Many Primary Keys