Database Management System

1. DATABASE
MANAGEMENT
SYSTEM
By,
LAKSHMI.S,
Assist.Professor,
Depat. of Computer Science,
Sri Adi Chunchanagiri Women’s College,
Cumbum.

2. DBMS
 Database – a collection of data that is logically coherent.
 DBMS – Database Management System
 defines, creates, and maintains a database.
 Introduced during 1960’s.
 Used for controlling databases either in he hard disk in a PC or on
network.
 Doesn’t Consider relationship between tables.
 Has several Components like External interface,DB Language
Engine, Query Optimizer,DB Engine, DBMS Management
Component.

3. DBMS COMPONENTS

4. ARCHITECTURE

5. DATABASE
ARCHITECTURE

6. DATABASE
MODELS

7. DATABASE MODELS
 A database model
 defines the logical design of data.
 Describes the relationships between different
parts of data.
 3 models
 Hierarchical model
 Network model
 Relational model

8. HIERARCHICAL MODEL
 Data are organized as an upside down
tree.
 Each entity has only one parent but can
have several children.

9. NETWORK MODEL
 The entities are organized in a graph.
 Some entities can be accessed through
several paths.

10. RELATIONAL MODEL
 Data are organized in two-dimensional
tables called relations.
 The tables are related to each other.
 The most popular model.

11. TYPES OF DBMS
 Navigational .
 RDBMS.
 OODBMS.
 ORDBMS.
 Hierarchical DBMS.
 Network DBMS.

12. RDBMS

13. RELATIONAL MODEL
 RDBMS (Relational Database Management
System)
 Introduced during 1970’s.
 Introduced Relational Model instead of Navigational
Model.
 Has Relationship between tables.
 Using primary keys,foreign keys and Indexes.

14. DBMS Vs RDBMS

15. DBMS VS RDBMS
DBMS RDBMS
 Introduced in 1960’s Introduced in 1970’s.
 Followed Navigational DBMS Relationship between table
for storage. using keys,indexes.
 Data fetching is slower for complex Faster because of its
relational and large amount of data. Model.
 Used for applications using small Used for Complex and large
amount of data. Amount of data.
 Data redundancy common Keys and Indexes are used in the
in this model. tables to avoid redundancy.
 Examples : dBase,Microsoft Access, Examples: SQL
LibreOffice Base,FoxPro. Server,Oracle,MySQL,
SQLite.