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Unlock 2+ expert-curated relational databases tutorials, real-world code snippets, and modern dev strategies. From fundamentals to advanced topics, boost your relational databases skills on DeveloperBreeze.
Result: John, Mary, Steve
The UNION operator combines results from two or more SELECT statements, removing duplicates. Use UNION ALL to include duplicates.
UNION
SELECT
UNION ALL
Result:
The LEFT JOIN returns all records from the left table and the matched records from the right table. Unmatched records from the right table are returned as NULL.
LEFT JOIN
NULL