I'm studying Database Design and I am in trouble with the Candidate Keys and the Functional Dependencies.
I have these Functional Dependences:
B → CEF
G → AD
B → DG
GA → B
My idea is: Since GA is the only one attribute that is not functionally determined by anyone, then, by using Armstrong's Axioms, I see that GA determines all attribute of the Schema S.
So there is only one Candidate Key: GA.
Am I right? Thanks in advance.