The Presence of One or More Foreign Keys in a Relation

question 74

Multiple Choice

The presence of one or more foreign keys in a relation prevents ________.

• A)the elimination of modification anomalies
• B)the elimination of duplicated data
• C)more complex SQL for multitable subqueries and joins
• D)Both A and B are correct

---

Definitions:

Total Cost

The complete amount of money spent on producing or purchasing goods and services, including both fixed and variable costs.

Output

The amount of goods or services produced by a person, machine, factory, country, etc.

Marginal Cost Curve

A graph that displays the cost of producing each additional unit, typically showing how marginal cost changes as production increases.

Average Total Cost (ATC)

The total cost of production divided by the quantity of output produced, representing the per unit cost of production.