Which of the following is correct?
A. Room_no is a candidate key
B. Phone is a candidate key
C. (Cabin_no, Phone) and (Cabin_no, Room_no) are the candidate keys.
D. (Room_no, Phone) and (Room_no, Cabin_no) are the candidate keys.
Answer:C
Which of the following is correct?
A. Room_no is a candidate key B. Phone is a candidate key C. (Cabin_no, Phone) and (Cabin_no, Room_no) are the candidate keys. D. (Room_no, Phone) and (Room_no, Cabin_no) are the candidate keys.