2368. Orders: Find customers whose average completed order value exceeds a threshold. — Python + FastAPI + SQLAlchemy

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

In a orders module, solve this as a production problem using Python + FastAPI + SQLAlchemy: Find customers whose average completed order value exceeds a threshold. Provide the SQL, explain the logic, show safe application integration, and mention failure/edge cases.

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Answer & Explanation

4 Answers

Verified Correct Answer

Option A

SELECT customer_id,AVG(total_amount) avg_order FROM orders WHERE status='completed' GROUP BY customer_id HAVING AVG(total_amount)>:threshold;

Additional Explanation

HAVING filters aggregate customer-level metrics.

Verified

Option B

DELETE FROM table_name;

Additional Explanation

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

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

UPDATE table_name SET status='active';

Additional Explanation

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