This document provides an overview of database management systems (DBMS). It defines data as distinct pieces of information that are measured, collected, and analyzed. A DBMS is a software tool that creates and manages databases to conveniently store and retrieve organized data. DBMS are used to develop applications faster, provide data independence and efficient data access, enable uniform data administration, and ensure data integrity, security, and concurrent access. DBMS are widely used in industries like airlines, telecom, universities, banking, and sales. The key advantages of a DBMS include data independence, efficient data access, data integrity and security, and data administration. A DBMS has components like users, database applications, the DBMS software itself, and

1. Presenting by – SHUVROJIT MAJUMDER (B.tech, CSE)
Year - 3rd Year Sem - 6th sem
Roll No. – 25900120006 Reg. No. – 202590100110010
Sub – Database Management Systems Sub Code – PCC-CS601

2. Contents

3. What is Data ?
According to the Oxford “Data is distinct pieces of information, usually
formatted in a special way”.
Data is measured, collected and reported, and analyzed, whereupon it is often
visualized using graphs, images or other analysis tools. Raw data
(“unprocessed data”) may be a collection of numbers or characters before it’s
been “cleaned” and corrected by researchers. It must be corrected so that we
can remove outliers, instrument or data entry errors
Why Data is Important 
 Data helps in make better decisions.
 Data helps in solve problems by finding the reason for underperformance.
 Data helps one to evaluate the performance.
 Data helps one improve processes.
 Data helps one understand consumers and the market.

4. A database management system (DBMS) refers to the technology for creating
and managing databases. DBMS is a software tool to organize (create,
retrieve, update, and manage) data in a database.
The main aim of a DBMS is to supply a way to store up and retrieve database
information that is both convenient and efficient. By data, we mean known
facts that can be recorded and that have embedded meaning.
Database systems are meant to handle an extensive collection of information.
Management of data involves both defining structures for storage of
information and providing mechanisms that can do the manipulation of those
stored information. Moreover, the database system must ensure the safety of
the information stored, despite system crashes or attempts at unauthorized
access.
What is DBMS ?
Database Management System 
Database Systems 

5. To develop software applications In less time.
Data independence and efficient use of data.
For uniform data administration.
For data integrity and security.
For concurrent access to data, and data recovery from crashes.
To use user-friendly declarative query language.
WHY TO USE DBMS ?

6. WHERE IS DBMS BEING USED ?
Airlines : reservations, schedules, etc
Telecom : calls made, customer details, network usage, etc
Universities : registration, results, grades, etc
Sales : products, purchases, customers, etc
Banking : all transactions etc

7. Data independence : Application programs should be as free or independent
as possible from details of data representation and storage. DBMS can supply
an abstract view of the data for insulating application code from such facts.
Efficient data access : DBMS utilizes a mixture of sophisticated concepts and
techniques for storing and retrieving data competently. This feature becomes
important in cases where the data is stored on external storage devices.
Data integrity and security : If data is accessed through the DBMS, the
DBMS can enforce integrity constraints on the data.
Data administration : When several users share the data, integrating the
administration of data can offer significant improvements. Experienced
professionals understand the nature of the data being managed and can be
responsible for organizing the data representation to reduce redundancy and
make the data to retrieve efficiently.
Advantages of DBMS

8. Components of DBMS
Users : Users may be of any kind such
as DB administrator, System
developer, or database users.
Database application : Database
application may be Departmental,
Personal, organization's and / or
Internal.
DBMS : Software that allows users to
create and manipulate database
access,
Database : Collection of logical data
as a single unit.

9. REFERENCES
1. https://www.geeksforgeeks.org/what-is-data/
2. https://www.geeksforgeeks.org/introduction-of-dbms-database-
management-system-set-1/
3. Database Management System - Components, Types & Advantages
(byjus.com)
4. https://www.academia.edu/67444779/Introduction_to_Database_Managem
ent_System