One important inheritance characteristic is that all entity subtypes inherit their _____ key attribute from their supertype.
A) primary
B) natural
C) foreign
D) surrogate

Question

Quizplus · Accepted Answer

The primary key attribute uniquely identifies each entity instance, and it is the most important attribute for identification and data retrieval. Therefore, all entity subtypes inherit their primary key attribute from their supertype. Natural keys are based on real-world attributes and are not necessarily inherited. Foreign keys are used to establish relationships between tables, while surrogate keys are artificial keys created solely for identification purposes and are also not necessarily inherited.

One Important Inheritance Characteristic Is That All Entity Subtypes Inherit