Show that the following decomposition of the schema r of, Ask an Expert

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Show that the following decomposition of the schema R of Practice Exercise 8.1 is not a lossless decomposition:

(A, B, C)

(C, D, E)

Hint: Give an example of a relation r on schema R such that

a. Compute B+.

b. Prove (using Armstrong's axioms) that AF is a super key.

c. Compute a canonical cover for the above set of functional dependencies F; give each step of your derivation with an explanation.

d. Give a 3NF decomposition of r based on the canonical cover.

e. Give a BCNF decomposition of r using the original set of functional dependencies.

f. Can you get the same BCNF decomposition of r as above, using the canonical cover?

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Computer Engineering, Engineering

Category:- Computer Engineering
Reference No.:- M91782437

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