What Is a Primary Key

question 53

Multiple Choice

What is a primary key?

• A) A field (or group of fields) that uniquely identifies a given entity in a table
• B) A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship among the two tables
• C) Characteristics or properties of an entity class
• D) A field (or group of fields) that uniquely identifies a given attribute in a table

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Definitions:

Sixteenth Amendment

An amendment to the U.S. Constitution, ratified in 1913, granting Congress the power to levy an income tax.

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