Attributes A, B, and C are all unique valued attributes. Which of the following is TRUE for R?
A. A is a candidate key for R
B. B is a candidate key for R
C. (A, C. is a super key for R
D. all of the above
Answer:D
Attributes A, B, and C are all unique valued attributes. Which of the following is TRUE for R?
A. A is a candidate key for R B. B is a candidate key for R C. (A, C. is a super key for R D. all of the above