This document discusses different types of data models used in database management systems (DBMS), including record-based, relational, network, hierarchical, and entity-relationship (ER) models. It provides an overview of key concepts like data, information, databases, and data models. For each model type, it describes how data is organized and represented. For example, it explains that the relational model organizes data into two-dimensional tables with attributes and tuples, while the hierarchical model structures data in a tree configuration. The ER model views data as entities and relationships between entities.

1. All Data models
in DBMS

2. 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
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3. A data is known as the row fact which is stored in
computers memory and used by the user as the
output.
Example-21.
Data

4. Information
Collection of data its called information.
Example-House no 21C-S-1,Sch No 78 Indore

5. Database
A collection of inter related data its called
database.

6. Data Model
A data model is a collection of concepts that
can be used to describe the structure of a
database.

7. Types of Data Models
1.Record Base model
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8. 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.
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9. Relational model
• In the relational model, data is
organized in two-dimensional tables
called relations.
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10. Relations
No Course-Name Unit
CIS15 Intro to C 5
CIS17 Intro to Java 5
CIS19 UNIX 4
CIS51 Networking 5
Attributes
Tuples
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11. • Attributes.
Each column in a relation is called an attribute.
Relations
• Tuples
Each row in a relation is called a tuple. A
tuple defines a collection of attribute values.
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12. 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
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13. Hierarchical Model
The hierarchical data model organizes
data in a tree structure

14. PROFESSORS
No Name
ID Name CourseNo Name Unit
ID Name
DEPARTMENT
COURSES STUDENTS
Hierarchical Model
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15. 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
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16. 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.
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