Related Questions

A subtype entity is a special case of another entity called a supertype entity.
A subtype discriminator of the supertype is an attribute whose values determine the target subtype(s).
If an entity adheres to the disjoint rule, then an entity instance can be a member of more than one entity for a given supertype.
It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type.
A supertype/subtype hierarchy is which of the following?
Use of a supertype/subtype relationship is necessary when which of the following exists?
A supertype/subtype hierarchy has which of the following features?
When mapping a supertype/subtype relationship which of the following is true?
A supertype can only have only one subtype.
There is cardinality on an EER between the supertype and subtype.