Object-oriented Data Model

DatabaseMCA

Object oriented data model is based upon real world situations. These situations are represented as objects, with different attributes. All these object have multiple relationships between them.

Elements of Object oriented data model

Objects

The real world entities and situations are represented as objects in the Object oriented database model.

Attributes and Method

Every object has certain characteristics. These are represented using Attributes. The behaviour of the objects is represented using Methods.

Class

Similar attributes and methods are grouped together using a class. An object can be called as an instance of the class.

Inheritance

A new class can be derived from the original class. The derived class contains attributes and methods of the original class as well as its own.

Example

An Example of the Object Oriented data model is − 

Shape, Circle, Rectangle and Triangle are all objects in this model. 

Circle has the attributes Center and Radius.

Rectangle has the attributes Length and Breath

Triangle has the attributes Base and Height.

The objects Circle, Rectangle and Triangle inherit from the object Shape.

raja
Published on 25-Jul-2018 22:38:00
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