record storage and file managment, Database Management System

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what is un ordered and ordered file managment?

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Attribute, a set of possible data value of an attribute is called??

a set of possible data value of an attribute is called??

What is the use of rename operation, What is the use of rename operation? ...

What is the use of rename operation? Rename operation is used to rename both relations and an attributes. It uses the as clause, taking the form: Old-name as new-name.

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