A key is an attribute or group of attributes that assumes a unique value for each entity instance. It is sometimes called the domain of the attribute.

Name: A key is an attribute or group of attributes that assumes a unique value for each entity instance. It is sometimes called the domain of the attribute.
Brand: Quizplus
Rating: 4.8 (34 reviews)

Question

Quizplus · Accepted Answer

A key is an attribute or group of attributes that uniquely identifies each entity instance, but it is not called the domain. The domain refers to the set of possible values an attribute can have.

A Key Is an Attribute or Group of Attributes That