Data Models PPT DBMS.pptx Engr Jawad Jamali

Topic : Data Models
Presented by : Jawad Ahamed Jamali(23CSE-**)

What is a Data
Model?
What is the
Relational Data
Model?
Components of the
Relational Model
Advantages of the
Relational Model
Table of contents
01 02
03 04

Example of a
Relational Database
Conclusion and
Future of Relational
Databases
Table of contents
05 06

What is a Data
Model?
•Definition:
A database is a collection of data
organized in a structured way, making
it easy to access, manage, and update.
•Examples:
•Library catalog
•Online shopping records
•Importance:
Helps store and retrieve data efficiently.

What is the
Relational Data
Model?
02

What is the
Relational Data
Model?
•Definition:
The relational data model organizes data
into tables (called relations), where each
table consists of rows and columns.
•Key Concepts:
•Table (Relation): A collection of rows and
columns.
•Tuple (Row): A single record in a table.
•Attribute (Column): A property or field of
the data.

Components of the
Relational Model
03

Components of the
Relational Model:
•1. Relations (Tables):
Data is stored in tables, which consist of
rows (tuples) and columns (attributes).
•2. Domain:
A set of permissible values for an attribute.
•3. Keys:
•Primary Key: Uniquely identifies each row
in a table.
•Foreign Key: A field that links one table to
another.
•Visuals: Simple table with primary and
foreign key labeled.

Advantages of the
Relational Model
04

Advantages of the Relational
Model
•1. Simplicity:
Data is stored in a clear and simple table format.
•2. Flexibility:
It supports complex queries, including joins, aggregations, and sorting.
•3. Data Integrity:
Ensures data accuracy and consistency through constraints like primary
and foreign keys.
•4. Scalability:
Suitable for both small and large databases.

Example of a Relational Database
05

Example of a Relational Database
StudentID Name Age
1 VISHWAS 20
2 MUJAHID 22
Course ID StudentID CourseName
C1 1 WEB-DEVELOPMNT
C2 2 E-COMMERECE
•COURSE TABLE :
•STUDENT TABLE :
Join Example:
Using SQL to join these two tables by StudentID to see which courses each
student is taking.

Conclusion and Future of
Relational Databases
06

Conclusion and Future of
Relational Databases :
•Summary:
The Relational Data Model is one of the most widely used models, offering a
simple, effective way to manage structured data in tables.
•Future Trends:
•Cloud databases using relational models.
•Integration of relational databases with big data tools.
•Call to Action:
Learn SQL for interacting with relational databases.

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Data Models PPT DBMS.pptx Engr Jawad Jamali

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