Answered: Explain how 2NF and 3NF vary from their…

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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Explain how 2NF and 3NF vary from their general definitions in their essential notions. Demonstrate.

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Step 1

2NF: This specifies a relation that is in first normal form, and it should not have any non-prime attribute that is functionally reliant on any suitable subset of any candidate.

Moreover, it should not have any non-prime attribute that is functionally dependent on any candidate.

It is a database design that must fulfil the third normal form and decreases the duplication of data, avoids data anomalies, and simplifies the administration of data.

In addition, it satisfies all of the requirements of the second normal form.

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