Describe the three levels of data abstraction Presidency university Bangalore DBMS

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Asked On2017-07-06 04:59:31 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.

 


Answerd on:2017-07-07 Answerd By:Fututron

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