The standard database structure consisting of conceptual , external and internal levels . In three schema architecture have three levels of abstraction at which a database could be viewed. These three levels are .... for more details u may get please visit http://www.database-concept.com/
Database is used to store, manipulate and retrieve data in every type of organization like Business, Healthcare, Education, Govt and Libraries. Database technology is used by Individuals like Personal Computers, or by working groups Like Department wise, and Enterprise wise and Distributed wise.
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