Database concept Introduction

Database concept 

Introduction

» File System

» Database Management 

System

» Rational Data Model

» Keys in a Relational 

Database concept 

• “Inconsistency of your mind… Can 
• damage your memory… Remove the 
• inconsistent data… And keep the original 
• one !!!” 
•  — Nisarga Jain 

Introduction

After learning about importance of data in the 

previous chapter, we need to explore the methods 

to store and manage data electronically. Let us 

take an example of a school that maintains data 

about its students, along with their attendance 

record and guardian details.

The class teacher marks daily attendance of the 

students in the attendance register. The teacher 

records ‘P’ for present or ‘A’ for absent against 

each student’s roll number on each working day. 

If class strength is 50 and total working days 

in a month are 26, the teacher needs to record 

50×26 records manually in the register every 

month. As the volume of data increases, manual 

data entry becomes tedious. Following are some 

of the limitations of manual record keeping in 

this example:

8 

Database Concepts

Rationalised 2023-24