For a relation R(A, B, C), if A → B and A → C holds, then A → BC also holds. Which of the following rule ensures this?
A. Augmentation rule
B. Union rule
C. Decomposition rule
D. None of the above
Answer:B
For a relation R(A, B, C), if A → B and A → C holds, then A → BC also holds. Which of the following rule ensures this?
A. Augmentation rule B. Union rule C. Decomposition rule D. None of the above