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Data abstration

Arjun Panwar

14y1.8kSQL

Hi,

in sql server what is three levels of data abstraction ?

Thanks

2 Replies

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Satyapriya Nayak14y ago
Hi Arjun,

There 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.

Thanks
Vulpes14y ago
Check this link:

http://www.dotnetfunda.com/interview/exam2043-what-are-the-three-levels-of-data-abstraction.aspx