Let us consider phone_number ,which can take single or several values . Treating phone_numberas an _________ permits instructors to have several phone numbers (including zero) associated with them.
A. Entity
B. Attribute
C. Relation
D. Value
Answer:A
Let us consider phone_number ,which can take single or several values . Treating phone_numberas an _________ permits instructors to have several phone numbers (including zero) associated with them.
A. Entity B. Attribute C. Relation D. Value
Explanation:Treating a phone as an attribute phone_number implies that instructors have precisely one phone number each.