Describe the three levels of data abstraction Presidency university Bangalore DBMS

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Describe the three levels of data abstraction. Presidency university, Bangalore - DBMS

Question from Presidency University Bangalore- tests

By:Aparna-Dasgupta

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The are three levels of abstraction:


Physical level:
The lowest level of abstraction describes how data are stored.

Logical level:
The next higher level of abstraction, describes what data are stored in database and what relationship among those data.

View level:
The highest level of abstraction describes only part of entire database.

 


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