2769. JSON: Find users whose JSON preferences enable notifications. — Java Spring/JDBC

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

In a json module, solve this as a production problem using Java Spring/JDBC: Find users whose JSON preferences enable notifications. 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

DELETE FROM table_name;

Additional Explanation

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

Verified

Option B

UPDATE table_name SET status='active';

Additional Explanation

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

Verified Correct Answer

Option C

SELECT id FROM users WHERE JSON_EXTRACT(preferences,'$.notifications')=true;

Additional Explanation

JSON expressions can query semi-structured settings; frequent predicates may benefit from generated columns.

Verified

Option D

SELECT * FROM table_name;

Additional Explanation

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