1166. Monthly revenue — Content CMS — implementation variant 16

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

In a Content CMS application, implement this production problem: Calculate completed revenue by calendar month. 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

SELECT * FROM the_table;

Additional Explanation

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

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 Correct Answer

Option D

SELECT DATE_FORMAT(order_date,'%Y-%m') month,SUM(total_amount) revenue FROM orders WHERE status='completed' GROUP BY DATE_FORMAT(order_date,'%Y-%m') ORDER BY month;

Additional Explanation

Group by a normalized month key. On very large tables, consider date dimensions or suitable generated/indexed columns.