What Does a Primary Key Do

question 23

Multiple Choice

What does a primary key do?

• A)Identifies each row of a table.
• B)Selects a number of rows from a database.
• C)Stores a bunch of related data.
• D)None of the above.

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Definitions:

Travel

The movement of people between distant geographical locations, which can be done by foot, bicycle, automobile, train, boat, bus, airplane, or other means.

Sound Registering

The process of detecting and recognizing sound waves by auditory systems.

DbA

DbA refers to a unit of measurement for sound intensity, adjusted to the human ear's response to different frequencies, indicating the apparent loudness of sounds.

Mass Transit

Public transportation systems designed to move large numbers of people efficiently across cities and other populated areas.