Databases allow for the effective and efficient storage and retrieval of related data about different entities. A database contains tables that organize attributes about entities like students, classes, and teachers. A Database Management System (DBMS) is a software used to create and manage databases, providing features like security, data integrity, consistency, and atomicity.

1. Introduction to DBMS

2. What is Data?
Data is a collection of information or facts about a certain entity.
Entity: Car Entity: Student Entity: Ecommerce Order
Registration number, type, state
of registration, colour
Roll number, name, age, class Order Number, Amount, Date

3. Database Tables
A Database table is a collection of information about a certain type of entity.
ID Student Name Roll No. Age
1 John Doe 2 14
2 Smith Williams 34 16
3 Alice John 17 15

4. What is a Database?
Database is a storage of interrelated data that has been organized in a way
such that the process of retrieving data is effective and efficient.
E.g. Student Database
Entities/Tables Data/Attributes
Students Roll number, name, age, class
Classes Class name, Subject, Class Teacher
Teachers Name, Subjects
Subjects Name

5. Why is a Database needed?
- To store data
- To provide easy access to data

6. Applications of Database
- Ecommerce
- Online Taxi/Cab services
- Food Delivery Apps
- University, Schools, and Colleges
- Company/Offices

7. Database Management System (DBMS)
- A Database Management System is a system for storing, modifying and
retrieving data from a database.
Features of DBMS include:
- Security
- Integrity of Data
- Consistency
- Atomicity