3447. Audit: Find changes made outside business hours. — Performance

DBMS Published 30 Sept 2026 Updated 30 Sept 2026 0 Views Verified

In a audit module, solve this as a production problem using Performance: Find changes made outside business hours. Provide the SQL, explain the logic, show safe application integration, and mention failure/edge cases.

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Answer & Explanation

4 Answers

Verified

Option A

UPDATE table_name SET status='active';

Additional Explanation

Incorrect: it does not satisfy the stated business rule and can return/change unintended data.

Verified

Option B

SELECT * FROM table_name;

Additional Explanation

Incorrect: it does not satisfy the stated business rule and can return/change unintended data.

Verified

Option C

DELETE FROM table_name;

Additional Explanation

Incorrect: it does not satisfy the stated business rule and can return/change unintended data.

Verified Correct Answer

Option D

SELECT * FROM audit_logs WHERE HOUR(created_at)<9 OR HOUR(created_at)>=18;

Additional Explanation

Define business hours and timezone explicitly for production reporting.