Given the Universal Relation Schema URS (A, B, C, G, W, X, Y, Z) and the set

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Given the Universal Relation Schema URS (A, B, C, G, W, X, Y, Z) and the set of FDs prevailing over URS, F {fd1, fd2, fd3, fd4, fd5}, where:

a. Derive a canonical cover of F.
b. Derive the candidate key(s) of URS.
c. Is the fd {X, A, Z} †’ {W} in F+?

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Data Modeling and Database Design

ISBN: 978-1285085258

2nd edition

Authors: Narayan S. Umanath, Richard W. Scammel

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Question Posted: Apr 21, 2016 06:27 AM

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Given the Universal Relation Schema URS (A, B, C, G, W, X, Y, Z) and the set

Question:

fd3: (Y, A} → {C, G); fdl: B → G; fd4: C → W; fd2: (X, Z} → {Z, Y, B}; fd5: (X, Z} > 6;

Step by Step Answer:

a fd1 B G fd2b X Z Y fd2c X Z B ...View the full answer

Data Modeling and Database Design

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