Joins Development Tutorials, Guides & Insights

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.

SELECT employees.name, departments.department_name
FROM employees
RIGHT JOIN departments
ON employees.department_id = departments.department_id;

The FULL JOIN combines the results of both LEFT JOIN and RIGHT JOIN. It returns all records when there is a match in either the left or right table.