Introductory slides of Data Base Management Systems

1. DATABASE
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D a t a s c i e n c e
S e c t i o n A

2. AGENDA
 W h a t i s a d a t a b a s e ?
 W h a t i s d a t a b a s e
m a n a g e m e n t s y s t e m ?
 W h y D B M S ?
 C o m p o n e n t s o f D B M S .
 T y p e s o f D B M S .
 A p p l i c a t i o n o f D B M S .
 P o p u l a r D B M S s o f t w a r e .
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3. 3
DATABASE SYSTEM
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•Database
•Database management system

4. 4
WHAT IS DATABASE
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•A database is an ordered collection of information
stored and read electronically from a computing system.
•This structured information is often retrieved, managed
and controlled and arranged to perform various data
preprocessing operations.

5. 5
WHAT IS A DATABASE MANAGEMENT SYSTEM?
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• Database management system is an application software which
is used to perform various operations on data .
• Example: MY SQL
• DBMS provides a platform for users to carry out different
actions like database creation, updating, deletion and a lot
more.
• All the process are protected and secured even data
consistency is maintained during multiple users.

6. DBMS
WHY DBMS?
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FLAT FILE SYSTEM
• It does not support
multi user access.
• Used by small business
• Redundancy and
integrity issues.
• Cheap
• Cannot work with
complicated transaction.
• Supports multi-user
access.
• Used by both small and
large business.
• No redundancy and
integrity issues.
• Expensive.
• Can work with
complicated
transactions.

7. 7
COMPONENTS OF DBMS
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8. 8
TYPES OF DATABASE
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Hierarchical model:
• Data is organized in tree like structure.
• Data entities has one to many relation.
Relational model:
• Data is organized in two dimensional tables using rows and columns.
• Stored in fixed structures and updated using SQL.

9. 9
TYPES OF DATABASE
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Network model:
• Data is organized in a graph like structure.
• Data entities has one to one and many to many relationship.
Object oriented model:
Data is stored in the form of objects.
It is a combination of relational database features and OOPS concepts.

10. 10
APPLICATIONS OF DBMS
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11. 11
ADVANTAGES OF DBMS
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•Controls database redundancy
•Privacy
•Data integrity
•Backup and recovery
•Sharing of data
•Data consistency
•Data security

12. 12
DISADVANTAGES OF DBMS
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•Cost of hardware and software is quite high
•Huge size
•Higher impact of failure
•Complex to use

13. 13
POPULAR DBMS SOFTWARE
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