1. There exists a relation S(A, B, C, D, E, F) with the below functional dependencies. {A}→{D} {A}→{E} {D} {C} {D}→{F} Please answer true or false to the following statements with a short explanation as to why. a. Is A,B a superkey? b. Is the decomposition ABC, CDE, EFA a lossless join? c. Is the decomposition ABC, CDE, EFA a dependency preserving? d. Is {A} {E,F} logically implied by FDs present in the relation? e. Is relation S in BCNF?

1. There exists a relation S(A, B, C, D, E, F) with the below functional dependencies. {A}→{D} {A}→{E} {D} {C} {D}→{F} Please answer true or false to the following statements with a short explanation as to why. a. Is A,B a superkey? b. Is the decomposition ABC, CDE, EFA a lossless join? c. Is the decomposition ABC, CDE, EFA a dependency preserving? d. Is {A} {E,F} logically implied by FDs present in the relation? e. Is relation S in BCNF?

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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