1743. Revenue reconciliation — Marketplace — implementation variant 43

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

In a Marketplace application, implement this production problem: Find orders whose stored total differs from the sum of their order items by more than one cent. 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

Option B

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 Correct Answer

Option C

SELECT o.id,o.total_amount,SUM(oi.quantity*oi.unit_price) item_total FROM orders o JOIN order_items oi ON oi.order_id=o.id GROUP BY o.id,o.total_amount HAVING ABS(o.total_amount-SUM(oi.quantity*oi.unit_price))>0.01;

Additional Explanation

Aggregate item values and compare them with the stored order total. Investigate before changing financial data.

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.