week 4 lab 5 done

subquery_lab.sql

@@ -0,0 +1,79 @@
+USE sakila;
+-- 1
+SELECT COUNT(*) AS number_of_copies
+FROM inventory
+WHERE film_id = (SELECT film_id FROM film WHERE title = 'Hunchback Impossible');
+-- 2
+SELECT title, length
+FROM film
+WHERE length > (SELECT AVG(length) FROM film);
+-- 3
+SELECT a.first_name, a.last_name 
+FROM actor a
+WHERE a.actor_id IN (
+    SELECT fa.actor_id 
+    FROM film_actor fa
+    WHERE fa.film_id = (SELECT film_id FROM film WHERE title = 'Alone Trip'));
+-- 4
+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';
+-- 5
+SELECT first_name, last_name, email
+FROM customer
+WHERE address_id IN (SELECT address_id
+    FROM address
+    WHERE city_id IN (SELECT city_id 
+		FROM city
+        WHERE country_id = (SELECT country_id 
+			FROM country
+            WHERE country = 'Canada')));
+-- 6
+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 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);
+-- 7
+SELECT customer_id
+FROM payment
+GROUP BY customer_id
+ORDER BY SUM(amount) 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);
+-- 8
+SELECT customer_id, total_amount_spent
+FROM (
+    SELECT customer_id, SUM(amount) AS total_amount_spent
+    FROM payment
+    GROUP BY customer_id
+) AS customer_totals
+WHERE total_amount_spent > (
+    SELECT AVG(total_spent)
+    FROM (
+		SELECT SUM(amount) AS total_spent
+        FROM payment
+        GROUP BY customer_id) AS total_spent);