QuestionAugust 10, 2025

How can referential integrity be violated? Select all that apply. A primary key is inserted. A row containing a primary key is deleted. A foreign key is updated. A row containing a foreign key is deleted. A primary key is updated. A row containing a foreign key is inserted.

How can referential integrity be violated? Select all that apply. A primary key is inserted. A row containing a primary key is deleted. A foreign key is updated. A row containing a foreign key is deleted. A primary key is updated. A row containing a foreign key is inserted.
How can referential integrity be violated? Select all that apply. A primary key is inserted. A row containing a primary key is deleted. A foreign key is updated. A row containing a foreign key is deleted. A primary key is updated. A row containing a foreign key is inserted.

Solution
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Answer

A row containing a primary key is deleted. ### A foreign key is updated. ### A primary key is updated. Explanation 1. Identify Referential Integrity Violation Referential integrity is violated when a foreign key in one table does not have a corresponding primary key in the referenced table. 2. Analyze Each Option - A primary key is inserted: No violation, as it adds a reference point. - A row containing a primary key is deleted: **Violation**, as it may remove a reference point for existing foreign keys. - A foreign key is updated: **Violation**, if updated to a non-existent primary key. - A row containing a foreign key is deleted: No violation, as it removes the foreign key without affecting the primary key. - A primary key is updated: **Violation**, if updated to a value that breaks existing foreign key references. - A row containing a foreign key is inserted: No violation, unless the foreign key does not match any primary key.

Explanation

1. Identify Referential Integrity Violation<br /> Referential integrity is violated when a foreign key in one table does not have a corresponding primary key in the referenced table.<br /><br />2. Analyze Each Option<br /> - A primary key is inserted: No violation, as it adds a reference point.<br /> - A row containing a primary key is deleted: **Violation**, as it may remove a reference point for existing foreign keys.<br /> - A foreign key is updated: **Violation**, if updated to a non-existent primary key.<br /> - A row containing a foreign key is deleted: No violation, as it removes the foreign key without affecting the primary key.<br /> - A primary key is updated: **Violation**, if updated to a value that breaks existing foreign key references.<br /> - A row containing a foreign key is inserted: No violation, unless the foreign key does not match any primary key.
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