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Question

What is a Primary Key in the context of a database table?

a.

A key used for encryption in databases

b.

A unique identifier for a database table

c.

A key used for data entry in databases

d.

A key used for database indexing

Posted under Data Warehousing and OLAP

Answer: (b).A unique identifier for a database table Explanation:A Primary Key is one or more fields or attributes that uniquely identify each record in a database table.

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