Answered: SQL Database Using the customer…

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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Question

SQL Database

Using the customer database attached, create an example of a table that is in second normal form but not in third normal form. justify your answer and show how to convert to the higher forms

CUSTOMER
CUSTOMER_NUM LAST_NAME
FIRST_NAME ADDRESS
CITY
STATE POSTAL_CODE PHONE

Expert Solution

Step 1

What is Normalization?

Normalization is the process of minimizing redundancy from a relation or set of relations characteristics like Insertion, Update and Deletion Anomalies.
Normalization rules divides larger tables into smaller tables and links them using relationships.
The purpose of Normalization in SQL is to eliminate redundant (repetitive) data and ensure data is stored logically.

Database Normal Forms

list of Normal Forms in SQL:

- 1NF (First Normal Form)
- 2NF (Second Normal Form)
- 3NF (Third Normal Form)
- BCNF (Boyce-Codd Normal Form)
- 4NF (Fourth Normal Form)
- 5NF (Fifth Normal Form)
- 6NF (Sixth Normal Form)

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