Why Do Relational Databases Use Primary Keys and Foreign Keys

question 127

Multiple Choice

Why do relational databases use primary keys and foreign keys?

• A) To create an entity.
• B) To create physical relationships.
• C) To create logical relationships.
• D) To create an attribute.

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Definitions:

Division

The process of assigning or distributing something into separate parts or groups.

Equation Complexity

A measure of the difficulty or intricacy of a mathematical equation, often based on the number of operations or variables involved.

Exponential Functions

Mathematical functions characterized by an expression in which a constant base is raised to a variable exponent.

Compound Interest

Interest for a loan or deposit that includes calculations on the original principal amount as well as the interest accumulated from earlier periods.