1891. Find slow-query candidates — Content CMS — implementation variant 41

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

In a Content CMS application, implement this production problem: Inspect the execution plan for a customer/date order query. 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.

Looking for the latest Sarkari Result 2026 updates? Check the latest government exam results, merit lists and result updates on Sarkari Resultess.

Answer & Explanation

4 Answers

Verified

Option A

SELECT * 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

Option C

DELETE FROM the_table;

Additional Explanation

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

Verified Correct Answer

Option D

EXPLAIN ANALYZE SELECT id,customer_id,order_date,total_amount FROM orders WHERE customer_id=:customer_id AND order_date>=:from_date ORDER BY order_date DESC LIMIT 50;

Additional Explanation

EXPLAIN ANALYZE provides execution information. Compare estimates with actual rows and inspect scans, sorting and index usage.