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:

FOB Shipping Point

A term in shipping contracts that specifies that the buyer is responsible for the cost and risk of transporting goods from the point of origin as soon as they are loaded onto the transport vehicle.

Freight Costs

Expenses associated with transporting goods from one location to another, including charges for shipping, handling, and insurance.

FOB Shipping Point

A delivery term indicating that the buyer takes ownership and risk for the goods once they are shipped, with FOB meaning "Free On Board".

Freight Costs

The expenses associated with transporting goods from one location to another.