4. Decomposition- BCNF. Consider relation R=(ABCDEFG), F={AB>CD, CDE→AB, AG>BD, BDG>EF} (a) Is it in BCNF? Provide a good justification – must use textbook definition and reasons given must be specific. (b) Apply the BCNF decomposition algorithm to decompose R into a set of BCNF tables. If this cannot be done, explain why.

4. Decomposition- BCNF. Consider relation R=(ABCDEFG), F={AB>CD, CDE→AB, AG>BD, BDG>EF} (a) Is it in BCNF? Provide a good justification – must use textbook definition and reasons given must be specific. (b) Apply the BCNF decomposition algorithm to decompose R into a set of BCNF tables. If this cannot be done, explain why.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Let R(ABCDEFG) be a relation and F={A -> C, A-> D, B->F, E->F, F->G} a. Show example of lossless join decomposition of R into three tables R1, R2 and R3 and demonstrate that this decomposition is lossless using chase algorithm b. Find one key for this scheme and prove that it is a key using closure algorithm and definition of a key.
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Q1Greetings, thatnk you in advance for your response. - Give a decomposition into 3NF of the following schema; - Prove that your 3NF normalization incurs no loss of functional dependencies r(A,B,C,D,E)F={ABàCDE, ACàD, BDàE} Thanks again.