Subtypes should be used when:
A) there are attributes that apply to some but not all instances of an entity type.
B) supertypes relate to objects outside the business.
C) the instances of a subtype do not participate in a relationship that is unique to that subtype.
D) a recursive relationship is needed.

Question

Quizplus · Accepted Answer

Subtypes should be used when there are attributes that apply to some but not all instances of an entity type, allowing for more specific categorization and management of those attributes.

Subtypes Should Be Used When