Question: Please help me to solve these questions? Database class. Thank you... I'd like some properties for my functional dependencies please. Select all the FD's that
Please help me to solve these questions? Database class. Thank you...
I'd like some properties for my functional dependencies please. Select all the FD's that follow from Armstrong's Axioms* if X rightarrow Z rightarrow W, then XZ rightarrow YW if X rightarrow Y and WY rightarrow Z, then WX rightarrow Z if X rightarrow YZ, then X rightarrow Y and X rightarrow Z if XZ rightarrow YZ, then X rightarrow Y if X rightarrow Y and W rightarrow Y, then X rightarrow W We have a relation R(A, B, C, D, E). We are told that the set of functional dependencies is F = {E rightarrow BC, A rightarrow B, C rightarrow D, AD rightarrow C}. Find the attribute closures for each of the attributes. If the attribute closure for X was WXZ, you would fill in "WXZ" without quotes in the answer box. We will be grading with a script so *please submit your answers in alphabetical order* and without any whitespace. A+:*___________B+: *____________C+:*_____________D+:*___________E+:*_____________Select the attribute set(s) that are keys for relation R * E ABC BCD ACE ABCDE
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