What Does a Primary Key Do

question 32

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:

Wayne's Jacket Shop

A hypothetical or specific retail business specialized in selling jackets.

Imperfectly Competitive Market

A market structure where all firms have some control over the prices because the products are differentiated and there are few participants.

Total-Product Schedule

A chart that shows the maximum output of a good achievable from different levels of input usage, holding technology constant.

Purely Competitive

A market structure characterized by a large number of small firms, homogeneity of product, and free entry and exit from the market.