1902. Paginated API count — School ERP — implementation variant 2

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

In a School ERP application, implement this production problem: Return the total matching count and a page of rows. 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

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 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

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

SELECT COUNT(*) FROM customers WHERE status=:status; SELECT id,name,email FROM customers WHERE status=:status ORDER BY id LIMIT :limit OFFSET :offset;

Additional Explanation

Count and page queries should use the same filters. At scale, consider whether exact count is necessary on every request.