Please TYPE IF POSSIBLE OR WRITE CLEARLY Consider a relation X with six attributes WYSMFE where WS is a composite primary key for X. Assume X has the following functional dependencies (X is one table with the attributes W, Y, S, M, F, E): WS è YMFE S è YME E è M

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
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Question 1: Normalization

 Please TYPE IF POSSIBLE OR WRITE CLEARLY

Consider a relation X with six attributes WYSMFE where WS is a composite primary key for X. Assume X has the following functional dependencies (X is one table with the attributes W, Y, S, M, F, E):

WS è YMFE

S è YME

E è M

 

  1. In what normal form is relation X? Explain why?

 

  1. Is it possible to decompose X into a number of relations in order to achieve a higher normal form? Explain how (this means using English sentences and a diagram showing the final relation(s)).
Expert Solution
Step 1

1. Primary key for the given relation is (W, S) 

The FDs

S -> YME

This is partial functional dependency violating 2NF

E->M 

Is transitive functional dependency violating 3NF.

Therefore the given relation is in 1Nf..

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