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lab-sql-subqueries_Done.sql

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+USE sakila;
+
+SELECT COUNT(*) AS number_of_copies
+FROM inventory
+WHERE film_id = (SELECT film_id FROM film WHERE title = 'Hunchback Impossible');
+
+SELECT title, length
+FROM film
+WHERE length > (SELECT AVG(length) FROM film)
+ORDER BY length DESC;
+
+
+SELECT a.actor_id, a.first_name, a.last_name
+FROM actor a
+JOIN film_actor fa ON a.actor_id = fa.actor_id
+WHERE fa.film_id = (SELECT film_id FROM film WHERE title = 'Alone Trip');
+
+
+SELECT f.title
+FROM film f
+JOIN film_category fc ON f.film_id = fc.film_id
+JOIN category c ON fc.category_id = c.category_id
+WHERE c.name = 'Family';
+
+
+SELECT c.first_name, c.last_name, c.email
+FROM customer c
+JOIN address a ON c.address_id = a.address_id
+JOIN city ci ON a.city_id = ci.city_id
+WHERE ci.country_id = (SELECT country_id FROM country WHERE country = 'Canada');
+
+
+SELECT f.title
+FROM film f
+JOIN film_actor fa ON f.film_id = fa.film_id
+WHERE fa.actor_id = (
+    SELECT actor_id
+    FROM film_actor
+    GROUP BY actor_id
+    ORDER BY COUNT(film_id) DESC
+    LIMIT 1
+);
+
+
+SELECT f.title
+FROM film f
+JOIN inventory i ON f.film_id = i.film_id
+JOIN rental r ON i.inventory_id = r.inventory_id
+WHERE r.customer_id = (
+    SELECT customer_id
+    FROM payment
+    GROUP BY customer_id
+    ORDER BY SUM(amount) DESC
+    LIMIT 1
+);
+
+
+SELECT customer_id, total_spent
+FROM (
+    SELECT customer_id, SUM(amount) AS total_spent
+    FROM payment
+    GROUP BY customer_id
+) AS customer_totals
+WHERE total_spent > (SELECT AVG(amount) FROM payment);