Top 10 movies that contributed the least/most revenue gain
SELECT D.title,
SUM(A.amount) AS total_amount,
F.name AS Genre
FROM payment A
INNER JOIN rental B ON A.rental_id = B.rental_id
INNER JOIN inventory C ON B.inventory_id = C.inventory_id
INNER JOIN film D ON C.film_id = D.film_id
INNER JOIN film_category E ON D.film_id = E.film_id
INNER JOIN category F ON E.category_id = F.category_id
GROUP BY 1, 3
ORDER BY total_amount ASC (for least) / DESC (for most)
LIMIT 10;
