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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
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