2943. JSON: Find users whose JSON preferences enable notifications. — Go database/sql

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In a json module, solve this as a production problem using Go database/sql: 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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Questions & Answers

Answer & Explanation

4 Answers
Verified

Option A

SELECT * FROM table_name;
Additional Explanation
Incorrect: it does not satisfy the stated business rule and can return/change unintended data.
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Editorial Answer 1
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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.
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Editorial Answer 2
Verified

Option C

DELETE FROM table_name;
Additional Explanation
Incorrect: it does not satisfy the stated business rule and can return/change unintended data.
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Editorial Answer 3
Verified Correct Answer

Option D

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.
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Editorial Answer 4