Retrieve Data Across Multiple Tables Using LEFT JOIN

SELECT u.id, u.username, p.title AS post_title, p.created_at AS post_date
FROM users u
LEFT JOIN posts p ON u.id = p.user_id
WHERE u.is_active = TRUE
ORDER BY u.username, p.created_at DESC;

How it works: This snippet illustrates how to combine information from the 'users' and 'posts' tables using a 'LEFT JOIN'. It ensures that all users (from the 'left' table) are included in the result, even if they haven't made any posts. If a user has no corresponding posts, the post-related columns will show NULLs. This is ideal for displaying a list of all users and their associated content, if any.