In a given relationship R, if an attribute A uniquely defines all other attributes, then the attribute A is a key attribute which is also known as the _________ key.
A. Candidate
B. Join
C. Functional
D. None of the Mentioned
Answer:A
In a given relationship R, if an attribute A uniquely defines all other attributes, then the attribute A is a key attribute which is also known as the _________ key.
A. Candidate B. Join C. Functional D. None of the Mentioned