First Normal Form

Introduction

First Normal Form (1NF) is a fundamental principle in database normalization that ensures the organization of data without any duplicate rows and with atomic values in each column. The goal of 1NF is to arrange data in a structured manner to minimize redundancy and support efficient database operations.

Consider a table named "Student_Records" that contains information about students' courses and their corresponding grades.

First Normal Form (1NF) aims to organize data by removing duplicate rows and ensuring atomic values in each column.

Consider the original table "Student_Grades" recording student information and grades obtained in different subjects:

Original Table:

Unnormalized Table

Transformation into 1NF:

To adhere to 1NF, ensure each column contains atomic values and remove duplicate rows.

Normalized Table:

Fiest Normal Form

Result:

• Each column contains atomic values, with no multi-valued cells (Subjects, Grades).
• Duplicate rows have been eliminated, ensuring distinct records for each student, subject, and grade.
• The table now adheres to the rules of First Normal Form (1NF), facilitating better data organization and reducing redundancy.