The Database Constraint That Says That Foreign Keys Must Be

question 29

Multiple Choice

The database constraint that says that foreign keys must be null or have a value corresponding to the value of a primary key in another table is formally called the

• A)entity integrity rule.
• B)referential integrity rule.
• C)rule of keys.
• D)referential entity rule.

---

Definitions:

Consumption

Consumption involves the use of goods and services by households, representing one of the primary components of economic activity and an indicator of economic health.

Total Cost

Represents the complete expense incurred in the production of goods or services, combining both fixed and variable costs.

Price of Cheese

The amount of money required to purchase a specific quantity or unit of cheese.

Utility Function

A mathematical expression that measures a consumer's satisfaction or happiness from consuming various bundles of goods and services.