Author Question: If A --> B and B --> A are existing functional dependencies, which of the following are NOT ... (Read 34 times)

cmoore54 · **on:** Jul 7, 2018

If A --> B and B --> A are existing functional dependencies, which of the following are NOT equivalent functional dependencies?

A) A --> B and B --> A
B) A --> B, X and B --> A, X
C) X --> A and A --> B
D) X, A --> B, X and X, B --> A, X

Question 2

If A --> B is an existing functional dependency, which of the following is an augmented functional dependency?

A) A, B --> C
B) A, C --> B
C) A --> C
D) B --> A