I am heartily thankful to our respected director sir for giving me such a great opportunity to giving this presentation.
I am also thankful to our respect Teachers for helping me in making of this presentation.
1. Data Models In DBMS
Made BY:-Sachin
Batch:-9 ‘O’ Clock
Roll NO.:-2024
Guided By:-
2. I am heartily thankful to our respected director
sir for giving me such a great opportunity to
giving this presentation.
I am also thankful to our respect Teachers for
helping me in making of this presentation.
3. Overview
• Data
• Information
• Database
• Data Model
Types of Data Model
1. Record Base model
•Relationship model
•Network Model
•Hierarchical Model
2.Entity Relationship Model
3.Object-Oriented Model
4. A data is known as the row fact which is stored in computers
memory and used by the user as the output.
Data
9. Types of Data Models
1.Record Base model • A record based data model is
used to specify the overall
logical structure of the database.
• Each record type defines a fixed
no. of fields having a fixed
length.
10. Relational model
• In the relational model, data is
organized in two-dimensional tables
called relations.
12. Relations
• Attributes.
Each column in a relation is called an attribute.
• Tuples
Each row in a relation is called a tuple. A tuple defines
a collection of attribute values.
13. Network Model
In the network model, the entities are
organized in a graph, in which some entities
can be accessed through several paths
No Name ID Name Course
No Name Unit ID Name
DEPARTMENT
COURSES
STUDENTS
PROFESSORS
16. 2.Entity Relationship Model
• The E-R (entity-relationship) data model views the real world as a set
of basic objects (entities) and relationships among these objects
ER Model Basics
•Entity
•Entity Set
•Attributes
•Relationship
17. Entity
• entity is a thing in the real world with an independent existance. and
entity set is collection or set all entities of a particular entity type at any
point of time.