958. Procedure with OUT parameter — implementation 4

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

Write the MySQL stored routine implementation for this backend/database task. Include validation where appropriate.

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Answer & Explanation

4 Answers

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Option A

Commit unrelated application work inside every function.

Additional Explanation

This option is incorrect for the stated requirement.

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Option B

Use a trigger when an explicit callable procedure/function is requested.

Additional Explanation

This option is incorrect for the stated requirement.

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Option C

Use only a SELECT and ignore the requested routine.

Additional Explanation

This option is incorrect for the stated requirement.

Verified Correct Answer

Option D

DELIMITER // CREATE PROCEDURE get_order_count(IN p_customer_id BIGINT, OUT p_count INT) BEGIN SELECT COUNT(*) INTO p_count FROM orders WHERE customer_id=p_customer_id; END // DELIMITER ;

Additional Explanation

Correct implementation. Prefer parameterized queries in application code, validate affected rows for UPDATE/DELETE, and use transactions for related writes.