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
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
Section: Chapter Questions
Problem 1PE
Related questions
Question
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
- In what normal form is relation X? Explain why?
- 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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