Update solutions.sql

solutions.sql

@@ -1 +1,144 @@
 -- Add you solution queries below:
+use sakila; 
+
+-- 1
+
+SELECT 
+    f.title, 
+    COUNT(i.inventory_id) AS total_copies
+FROM film f
+JOIN inventory i ON f.film_id = i.film_id
+WHERE f.title = 'Hunchback Impossible'
+GROUP BY f.title;
+
+
+ -- 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
+    JOIN film f ON fa.film_id = f.film_id
+    WHERE f.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 a.address_id 
+    FROM address a 
+    JOIN city ci ON a.city_id = ci.city_id
+    JOIN country co ON ci.country_id = co.country_id
+    WHERE co.country = 'Canada'
+);
+
+
+-- 6
+
+SELECT 
+    a.actor_id, 
+    a.first_name, 
+    a.last_name, 
+    COUNT(fa.film_id) AS film_count
+FROM actor a
+JOIN film_actor fa ON a.actor_id = fa.actor_id
+GROUP BY a.actor_id
+ORDER BY film_count DESC
+LIMIT 1;
+
+-- 6.1
+
+SELECT 
+    a.actor_id, 
+    a.first_name, 
+    a.last_name, 
+    COUNT(fa.film_id) AS film_count
+FROM actor a
+JOIN film_actor fa ON a.actor_id = fa.actor_id
+GROUP BY a.actor_id
+ORDER BY film_count DESC
+LIMIT 1;
+
+-- 6.2 
+
+SELECT 
+    f.title
+FROM film f
+JOIN film_actor fa ON f.film_id = fa.film_id
+WHERE fa.actor_id = X;
+
+
+-- 7
+
+SELECT 
+    c.customer_id, 
+    c.first_name, 
+    c.last_name, 
+    SUM(p.amount) AS total_payments
+FROM customer c
+JOIN payment p ON c.customer_id = p.customer_id
+GROUP BY c.customer_id
+ORDER BY total_payments DESC
+LIMIT 1;
+
+
+
+
+-- 7.1
+
+SELECT 
+    f.title
+FROM rental r
+JOIN inventory i ON r.inventory_id = i.inventory_id
+JOIN film f ON i.film_id = f.film_id
+WHERE r.customer_id = Y;
+
+-- 8
+
+SELECT 
+    customer_id, 
+    total_amount_spent
+FROM (
+    SELECT 
+        c.customer_id, 
+        SUM(p.amount) AS total_amount_spent
+    FROM customer c
+    JOIN payment p ON c.customer_id = p.customer_id
+    GROUP BY c.customer_id
+) AS customer_totals
+WHERE total_amount_spent > (SELECT AVG(total_amount_spent) FROM (
+    SELECT 
+        SUM(p.amount) AS total_amount_spent
+    FROM customer c
+    JOIN payment p ON c.customer_id = p.customer_id
+    GROUP BY c.customer_id
+) AS total_spent);
+
+