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c) Consider the following relation R with the functional dependencies: AC B, AD E, AB C, E→F, BC A, and BD. R A В C D E F 1 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) c) ADF. Is this decomposition dependency preserving?

c) Consider the following relation R with the functional dependencies: AC B, AD E, AB C, E→F, BC A, and BD. R A В C D E F 1 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) c) ADF. Is this decomposition 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
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c) Consider the following relation R with the functional dependencies: AC B, AD E, AB C, E→F, BC A, and B D. RA B C D E F 1 2 3 4 5 y 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) b) c) 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. RA B C D E F 1 2 3 4 5 y 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) b) c) 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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