3937. Orders: Find orders where the same product appears more than once in order_items. — Architecture

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

In a orders module, solve this as a production problem using Architecture: Find orders where the same product appears more than once in order_items. 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

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 Correct Answer

Option D

SELECT order_id,product_id,COUNT(*) cnt FROM order_items GROUP BY order_id,product_id HAVING COUNT(*)>1;

Additional Explanation

Duplicate lines may be valid in some schemas, but this identifies them for business review.