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Decompose R into a set of 3NF relations, that is lossless join and dependency preserving.

Decompose R into a set of 3NF relations, that is lossless join and dependency preserving.

Database System Concepts
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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Please answer part d)

c) Consider the following relation R with the functional dependencies: AC→B, AD E, AB →C, E F, BC A, and B D. R A C D E F 1 X 2 3 4 6. 7 8 9 10 Is {AB, BC, ABDE, EF} a lossless-join decomposition? Explain. Is the decomposition {ABC, ACDE, ADF} lossless join? Determine the projection of the set of functional dependencies of R onto ABC, ACDE, and a) ADF. Is this decomposition dependency preserving? d) Decompose R into a set of 3NF relations, that is lossless join and dependency preserving.
Transcribed Image Text:c) Consider the following relation R with the functional dependencies: AC→B, AD E, AB →C, E F, BC A, and B D. R A C D E F 1 X 2 3 4 6. 7 8 9 10 Is {AB, BC, ABDE, EF} a lossless-join decomposition? Explain. Is the decomposition {ABC, ACDE, ADF} lossless join? Determine the projection of the set of functional dependencies of R onto ABC, ACDE, and a) ADF. Is this decomposition dependency preserving? d) Decompose R into a set of 3NF relations, that is lossless join and dependency preserving.
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