Candidate keys that are not used for the primary keys are ________ keys.
A)artificial
B)natural
C)alternate
D)composite

Question

Quizplus · Accepted Answer

Alternate keys are candidate keys that are not chosen as the primary key, but can still be used to uniquely identify tuples/rows in a relation/table. Artificial keys are created solely for the purpose of being a primary key, while natural keys are attributes that have inherent meaning and can be used as primary keys. Composite keys are keys made up of multiple attributes.

Candidate Keys That Are Not Used for the Primary Keys