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Describe the delete set-to-default option (for implementing a referential integrity constraint).
Oligopoly
A market structure characterized by a few firms dominating the industry, leading to limited competition.
Industry Sales
The total volume of sales made by all businesses within a specific industry.
Monopoly
A market structure characterized by a single seller who controls all the supply of a particular good or service, and where entry of new competitors is obstructed.
Credit-Rating Industry
The sector of the financial industry that provides assessments of the creditworthiness of borrowers to potential lenders.
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