What Is the Purpose of the Primary Key

question 36

Multiple Choice

What is the purpose of the primary key?

• A)to uniquely identify each record in a table
• B)to uniquely identify each table in a database
• C)to create a relationship between two tables in a database
• D)to create a relationship for queries in a database

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Definitions:

Three-phase Motor

An electric motor powered by three alternating currents, offering a smoother and more efficient operation for industrial machinery.

NEMA

The National Electrical Manufacturers Association, an organization that sets standards for electrical equipment in North America.

IEC

The International Electrotechnical Commission, a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies.

Direction Of Rotation

The course in which a mechanical shaft, gear, or object turns, typically described as clockwise or counterclockwise.