2767. Gap analysis: Find missing sequence numbers between minimum and maximum order IDs. — Java Spring/JDBC

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

In a gap analysis module, solve this as a production problem using Java Spring/JDBC: Find missing sequence numbers between minimum and maximum order IDs. 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 Correct Answer

Option B

WITH RECURSIVE nums AS (SELECT MIN(id) n FROM orders UNION ALL SELECT n+1 FROM nums WHERE n<(SELECT MAX(id) FROM orders)) SELECT n FROM nums LEFT JOIN orders o ON o.id=n WHERE o.id IS NULL;

Additional Explanation

Useful for diagnostic checks, but ID gaps are often normal and should not automatically be treated as errors.

Verified

Option C

SELECT * FROM table_name;

Additional Explanation

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

Verified

Option D

DELETE FROM table_name;

Additional Explanation

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