Solved Lab

challenge.sql

@@ -0,0 +1,35 @@
+USE SAKILA;
+
+-- 1.
+SELECT COUNT(inv.inventory_id) as number_of_copies 
+FROM inventory as inv
+INNER JOIN film 
+ON inv.film_id=film.film_id
+WHERE inv.film_id = (SELECT film_id from film WHERE title LIKE 'Hunchback Impossible' LIMIT 1);
+
+
+-- Another Solution for 1.
+SELECT COUNT(inv.inventory_id) AS number_of_copies
+FROM inventory AS inv
+INNER JOIN film
+ON inv.film_id = film.film_id
+WHERE film.title LIKE 'Hunchback Impossible';
+
+-- 2.
+SELECT *
+from film
+WHERE film.length > (SELECT AVG(length) from film);
+
+-- 3.
+
+SELECT first_name, last_name
+FROM actor
+WHERE actor_id IN (
+    SELECT actor_id
+    FROM film_actor
+    WHERE film_id = (
+        SELECT film_id 
+        FROM film 
+        WHERE title = 'Alone Trip'
+    )
+);