BSc IT - Database Management System

In a DBMS , there are three levels of data abstraction  that help users see and understand data in different ways: 

    Physical Level : This is the lowest level. It tells how data is actually stored  on the storage devices, like files, indexes, or structures. It's for database administrators and not visible to regular users. 

    Logical Level (Conceptual Level) : This level describes what data is stored  in the database and the relationships between data . It is used by database designers and developers to understand how tables are connected and what rules apply. 

    View Level : This is the highest level and is closest to the end users. It shows only part of the whole database  — just the data relevant to a particular user or application. For example, a student may only see their own details, not all students in the system.