LEFT JOIN in SQL — a practical guide to SQL LEFT JOIN with clear examples you can reuse in real projects.
SQL Tutorial Series (49/100). Prefer one article? Read the complete SQL tutorial.
Short description
Unmatched right side columns appear as NULL — great for “users without orders”.
Left join
SELECT u.email, o.id AS order_id
FROM users u
LEFT JOIN orders o ON o.user_id = u.id;