2977. Orders: Find customers whose average completed order value exceeds a threshold. — Go database/sql

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

In a orders module, solve this as a production problem using Go database/sql: 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

Option A

SELECT * FROM table_name;

Additional Explanation

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

Verified Correct Answer

Option B

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 C

UPDATE table_name SET status='active';

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.