Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 14 Sep 2017 My Price 5.00

collection of relations

Exercise 19.5 Consider the following collection of relations and dependencies. Assume that each relation is obtained through decomposition from a relation with attributes ABCDEFGHI and that all the known dependencies over relation ABCDEFGHI are listed for each question. (The  questions are  independent of each other,  obviously,  since the given  dependencies   over A BCDEFGHI are different.) For each (sub)relation: (a) State the strongest nonnal fonn that the relation is  in.   (b) If it  is  not in BCNF, decompose it into a collection of BCNF   relations.

 

1.    Rl (A. C,B.D,E), A      13, C      D

2.               R2(A,B,F),   AC     B, B       F

3.               R3(            D       G,  G      H

4.              R4(D, G),  A       I,  I      A

5.    R5(A.I,C.B)

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Maurice Tutor
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Status NEW Posted 14 Sep 2017 12:09 PM My Price 5.00

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