A Rule That States That Each Foreign Key Value Must

question 52

Multiple Choice

A rule that states that each foreign key value must match a primary key value in the other relation is called the:

• A) referential integrity constraint.
• B) key match rule.
• C) entity key group rule.
• D) foreign/primary match rule.

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Definitions:

Perfectly Competitive Industry

A market structure characterized by many sellers offering identical products, where no single seller can influence the market price.

Marginal Cost

The additional expense incurred from producing one more unit of a good or service.

Standardized

Made uniform in form or character, often to enable comparability across different contexts or systems.

Perfectly Competitive

A market structure characterized by many buyers and sellers, free entry and exit, and a homogenous product, leading to no single consumer or producer having market power.