Multiple Choice
The "_____" characteristic of a primary key states that the primary key must uniquely identify each entity instance, must be able to guarantee unique values, and must not contain nulls.
A) unique values
B) nonintelligent
C) preferably single-attribute
D) security-complaint
Correct Answer:
Verified
Correct Answer:
Verified
Q38: The entity supertype contains common characteristics, and
Q39: Overlapping subtypes are subtypes that contain _
Q40: The purpose of an entity_ is to
Q41: The main concern with redundant relationships is
Q42: A(n)_ is a generic entity type that
Q44: The property of a subtype discriminator enables
Q45: A(n) _ occurs when a relationship is
Q46: Usually, a data modeler uses a natural
Q47: One practical advantage of a(n) _ key
Q48: One important inheritance characteristic is that all