1526. Conditional update — E-commerce — implementation variant 26

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

In a E-commerce application, implement this production problem: Increase active employee salaries by 10% only for a specified department. The API/service receives user input and must return or modify data safely. Give the SQL solution, explain why it works, and show how the same operation is called from the selected stack.

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Answer & Explanation

4 Answers

Verified

Option A

DELETE FROM the_table;

Additional Explanation

Incorrect: it does not implement the stated business rule and may modify/fetch the wrong rows.

Verified Correct Answer

Option B

UPDATE employees SET salary=salary*1.10 WHERE status='active' AND dept_id=:dept_id;

Additional Explanation

Keep UPDATE predicates narrow and parameterized. Check the affected-row count before committing sensitive changes.

Verified

Option C

UPDATE the_table SET status='active';

Additional Explanation

Incorrect: it does not implement the stated business rule and may modify/fetch the wrong rows.

Verified

Option D

SELECT * FROM the_table;

Additional Explanation

Incorrect: it does not implement the stated business rule and may modify/fetch the wrong rows.