Sql Programming Tutorials, Guides & Best Practices

Joins can be resource-intensive. Optimizing them is crucial for query performance.

When joining multiple tables, start with the table that filters out the most rows.

The RIGHT JOIN returns all records from the right table and the matched records from the left table. Unmatched records from the left table are returned as NULL.

SELECT columns
FROM table1
RIGHT JOIN table2
ON table1.common_column = table2.common_column;