What Is a Primary Key

question 15

Multiple Choice

What is a primary key?

• A) A field that uniquely identifies each record.
• B) The first field in every record..
• C) The largest field in every record..
• D) The first field specified when a table is created.

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Definitions:

Zoning Ordinance

Legislation that divides an area into zones to specify allowable land uses and regulate building standards, to shape urban growth and land use.

Socially Optimal

A situation in which resources are allocated in the most efficient manner from the perspective of society as a whole.

Subsidize

Financial support extended by a government or organization to lower the production costs or price of goods and services, making them more accessible to the public.

Negative Externalities

Costs suffered by a third party as a result of an economic transaction, which are not reflected in the transaction's price.