2531. Data quality: Find customers with invalid-looking email values. — Laravel Eloquent

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

In a data quality module, solve this as a production problem using Laravel Eloquent: Find customers with invalid-looking email values. 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.

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Option B

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 C

SELECT id,email FROM customers WHERE email IS NOT NULL AND (email NOT LIKE '%@%' OR email LIKE '% %');

Additional Explanation

This is only a basic data-quality check, not full RFC email validation.

Verified

Option D

DELETE FROM table_name;

Additional Explanation

Incorrect: it does not satisfy the stated business rule and can return/change unintended data.