Multiple Choice
The "____" characteristic of a primary key states the following: The PK must uniquely identify each entity instance.A primary key must be able to guarantee unique values.It cannot contain nulls.
A) unique values
B) nonintelligent
C) preferably single-attribute
D) security complaint
Correct Answer:
Verified
Correct Answer:
Verified
Q18: What is an entity cluster?
Q20: In specialization hierarchies with multiple levels of
Q20: The property of _ enables an entity
Q21: An entity cluster is formed by combining
Q23: The "_" characteristic of a primary key
Q25: Partial completeness is symbolized by _.<br>A) a
Q48: One important inheritance characteristic is that all
Q50: An entity cluster is considered "virtual" or
Q54: The relationships depicted within the specialization hierarchy
Q74: What do specialization hierarchies do?