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.

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A traditional perspective or theory within a field of study that has been widely accepted or used as a standard for a long period.

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