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:

Assembly Process

A sequence of operations in which components are put together to form a finished product.

Weight Density

A measure of how much mass a material has in a given volume, often used in shipping to determine freight classification.

Transportation Cost

The expenses associated with moving goods, materials, or people from one location to another, including fuel, labor, and vehicle maintenance costs.

Order Lead Time

The duration from when an order is placed until it is fully processed and delivered to the customer, affecting supply chain efficiency.