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Question

An ________ on an attribute of a relation is a data structure that allows the database system to find those tuples in the relation that have a specified value for that attribute efficiently, without scanning through all the tuples of the relation.

a.

Index

b.

Reference

c.

Assertion

d.

Timestamp

Posted under SQL DBMS

Answer: (a).Index

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Q. An ________ on an attribute of a relation is a data structure that allows the database system to find those tuples in the relation that have a specified value for that attribute...

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