If W X Y and Z are attributes of a relation which of the-04973
If W, X, Y and Z are attributes of a relation, which of the following inference rules for functionaldependencies is correct?
This multiple choice question (MCQ) is related to the book/course
vu cs403 Database Management Systems.
It can also be found in
vu cs403 Final Term - Quiz No.4.
If W, X, Y and Z are attributes of a relation, which of the following inference rules for functionaldependencies is correct?
If (X, Z) -> Y then X -> Y and Z -> Y.
If X -> Y and X -> Z then X -> (Y, Z)
If XY then Y -> X
If X -> Y then (X, Z) -> (Y,W).
