The document provides an introduction to database management systems (DBMS), explaining what data, databases, and DBMS are. It differentiates between traditional, multimedia, spatial, real-time, relational, and non-relational databases, highlighting the functions and examples of various database software. Additionally, it discusses the advantages of relational and non-relational databases, particularly in handling different data types.

1. DBMS Simple Introduction
Database management system
N.Jagadish Kumar
Assistant professor
Velammal Institute of technology

2. What is Data?
Any FACT that can be recorded
What is a FACT then?
fact - a thing that is known or proved to be true

3. Examples of Data
• Text  Name,address etc
• Numbers Mobileno,Houseno,Idno etc
• Images
• Videos
• Speech
All the above facts when it is recorded it is
called data.

4. What is a Database?
Database is a collection of related Data
or
A database is an organized collection of data,
generally stored and accessed electronically from a
computer system.
Database which holds only :
• Text & Number is called Traditional Database
• Images,Videos,Audios is called Multimedia database.
• Geographic data is called Spatial database
• Online transactional data is called Real time database

5. What is database Management system
(DBMS)?
A set of programs which is used to Define,
Construct and Manipulate the database is
called DBMS
(or)
A software to create databases and to store,
manage, change, search, and extract the
information contained within them is called
DBMS.

6. DBMS is also called as Database
Software
Database software used to protect the information
in the database and ensure that it’s both accurate
and consistent.
Functions of database software:
• data storage
• data backup and recovery
• data presentation
• multi-user access control
• data security management
• database communication

7. Examples of database software
Some of the most well-known database software
programs include:
• IBM DB2
• Microsoft Access
• Microsoft Excel
• Microsoft SQL Server
• MySQL
• Oracle RDBMS
• QuickBase
• SAP Sybase ASE
• Teradata

8. What is a relational database?
• A relational database is based on the model
invented by IBM’s E.F. Codd in the 1970s.
• Relational databases, use Structured Querying
Language (SQL).
• They present data in tabular form (i.e. as a
collection of tables with each table consisting
of a set of columns and rows) and provide
relational operators to manipulate data in
tabular form.

9. …..
• Today, many enterprise database management
systems employ relational databases, but they
can handle a minimal amount of data types,
and are more difficult to scale.

10. What is a non-relational database?
• A non-relational database is modeled by means
other than the tabular system used in the
relational database.
• A major advantage of the non-relational
database is that it can easily incorporate and
store all kinds of Big Data, including
unstructured and semi-structured data.