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Which of the following is correct? Function dependencies are not associated with relat

Which of the following is correct? Function dependencies are not associated with relat

Which of the following is correct?

(a)Function dependencies are not associated with relations; they are based on the semantics of information that we are dealing with
(b)If a relation has no redundant information its attributes must not have any function dependencies
(c)Functional dependencies may be determined if we are given several instances of a relation
(d)The FDs that hold for attributes of a relation need not be satisfied at all times
(e)BCNF is a fourth normal form.

Johnson 03-Jan-2018

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