This section focuses on retrieving data efficiently using joins, aliases, and filtering methods. Aliases (AS): Rename columns or tables for clarity in results. Joins: Combine rows from two or more tables based on related columns. ➤ INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN Filtering & Grouping: Extract specific records and organize them. ➤ WHERE, GROUP BY, HAVING, ORDER BY, LIMIT UNION: Merge results from multiple SELECT queries with same structure