The Database Requirement That Foreign Keys Must Be Null or Have

question 62

Multiple Choice

The database requirement 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)unique primary key rule.
• D)foreign key rule.

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Definitions:

Robust

Strong and effective in all or most situations and conditions; capable of withstanding or overcoming adverse conditions.

Valid Argument

A logical statement where the conclusion necessarily follows from the premises, based on sound reasoning.

Postconventional Stage

A level of moral development where individuals recognize universal ethical principles and prioritize them over laws and social agreements.

Care Perspective

The emphasis in moral development on context and relationships.