abstraction is show nonessential data to user ,
Data abstraction is the reduction of a body of data to a simplified representation of the whole. Data abstraction is usually the first step in database design in order to create a simplified framework that can be added to in order to complete the database.
Physical abstraction in data abstraction refers to hiding the implementation details of how data is stored and accessed. It allows programmers to work with high-level concepts of data without needing to understand the underlying physical structures. This separation enhances modularity and simplifies the complexity of software systems.
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health
Abstraction: Abstraction refers to removal/reduction of irrelevant data or unnecessary data or confidential data from a Class. Data hiding: Data hiding is a feature provided by the abstraction for hiding the data from the class.
select*from stludent
how data are stored would be in a physical layer
Data Encapsulation, Abstraction, Inheritance, Polymorphism
Abstraction means that all information exist but only the relevent information is provided to the user. Encapsulation assists abstraction by providing a mean of suppressing the non-essential details.
external level
features are: 1. Inheritance 2. Polymorphism 3. Data Encapsulation 4. Data Abstraction etc..