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The need for databases is as follows: Amit Sen Amit Sen
Richa Tondon Richa Tondon
Reduction of data redundancy: It refers to unnecessary Deepak Patel Deepak Patel
duplication of data. A centralised database helps avoid this Nitish Reddy Nitish Reddy
Anil Gurang Anil Gurang
by storing only one version of the data. Amit Sen
Richa Tondon
Data sharing: It allows multiple users to access and
work on the same data simultaneously, facilitating

real-time collaboration.
In the past, databases were managed manually on paper. This was time-consuming and
error-prone. As the need for handling more complex data grew, businesses and organisations
Data security: It ensures data safety through security systems, user
shifted to Relational Database Management Systems (RDBMS) like MySQL, PostgreSQL and
roles and permissions, allowing only authorised users to access and
Oracle. These systems offer several advantages over traditional manual methods.
modify the data.

DATA AND INFORMATION
Data integrity: Data integrity ensures that data is accurate,
Data includes raw facts, figures or symbols that are yet to be processed into meaningful information. consistent and reliable. Databases use constraints to prevent errors,
Data can exist in various forms, including numbers, text, images, audio, video or observations. such as disallowing negative quantities or verifying that a supplier

Information is processed and organised data that becomes meaningful and useful for exists before processing an order.
decision-making, trend analysis or learning.

Data backup: Data backup in databases means making a copy of the
Roll No. Computer
Roll No. Student Name 106 86 Roll No. Student Name Maths Science English Computer database files so that you can restore your data if it gets lost, damaged
101 Aarav Sharma 103 78 101 Aarav Sharma 85 90 88 85
101 85 102 Riya Patel 78 82 80 98 or corrupted. It is a safety measure to protect important information.
105 Arjun Reddy 105 81 103 Saanvi Iyer 92 88 91 78
Roll No. Science 102 98 104 Meera Deshmukh 70 75 72 79
102 Riya Patel 105 Arjun Reddy 88 84 86 81
101 90 104 79 106 Kavya Menon 80 85 79 86
105 84 104 Meera Deshmukh
102 82
103 Saanvi Iyer DATABASE MANAGEMENT SYSTEM (DBMS)
106 85
103 88 106 Kavya Menon
A Database Management System (DBMS) is a software that allows users to control the creation,
104 75
Data Process Information
maintenance and use of a database. It performs the tasks of maintaining databases so that the
information is readily available. It helps to manage the data of different fields like banks, offices,
INTRODUCTION TO DATABASE railways, airlines, etc. DBMS allows users to store, manage and organise all the data in a way that
makes it easy to find and use whenever they need it.
A database is defined as an organised collection of data that is stored and accessed
electronically. With the help of a database, data can be stored, modified and retrieved. It acts as
a container for information that can be efficiently managed. RELATIONAL DATABASE MANAGEMENT SYSTEM (RDBMS)

NEED FOR A DATABASE A relational database is a type of database that stores data in the form of tables. These tables are
structured with rows and columns and they can be related to each other through common fields
Data is important today, but without proper systems, it may become inconsistent or get duplicated.
(keys) to enable the retrieval of related information. The software package that is used to handle
A database keeps data organised and centralised making it accessible, secure and consistent.
relational databases is known as the Relational Database Management System (RDBMS).

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MySQL: My First Database