2725. HR: Calculate department salary percentile rank. — Java Spring/JDBC

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

In a hr module, solve this as a production problem using Java Spring/JDBC: Calculate department salary percentile rank. 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

SELECT id,name,dept_id,salary,PERCENT_RANK() OVER(PARTITION BY dept_id ORDER BY salary) percentile_rank FROM employees;

Additional Explanation

PERCENT_RANK provides relative position within each department.

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.