salved lab

solution.sql

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+USE sakila;
+
+SELECT c.name AS category_name,
+COUNT(fc.film_id) AS number_of_films
+FROM category AS c
+JOIN film_category AS fc 
+ON c.category_id = fc.category_id
+GROUP BY c.name
+ORDER BY number_of_films DESC;
+
+SELECT s.store_id, a.address
+FROM store AS s
+INNER JOIN address AS a ON s.address_id = a.address_id;
+
+SELECT s.store_id, c.city
+FROM store AS s
+INNER JOIN address AS a ON s.address_id = a.address_id
+INNER JOIN city AS c ON a.city_id = c.city_id;
+
+SELECT s.store_id, c.city, co.country
+FROM store AS s
+INNER JOIN address AS a ON s.address_id = a.address_id
+INNER JOIN city AS c ON a.city_id = c.city_id
+INNER JOIN country AS co ON c.country_id = co.country_id;
+
+SELECT 
+    s.store_id, 
+    SUM(p.amount) AS total_revenue
+FROM store AS s
+-- Unimos la tienda con sus pagos a través del staff_id
+JOIN staff AS st ON s.store_id = st.store_id
+JOIN payment AS p ON st.staff_id = p.staff_id
+-- Agrupamos por tienda para que la suma no sea un solo total global
+GROUP BY s.store_id;
+
+SELECT c.name AS category_name, AVG(f.length) AS average_running_time
+FROM category AS c
+JOIN film_category AS fc ON c.category_id = fc.category_id
+JOIN film AS f ON fc.film_id = f.film_id
+GROUP BY c.name;
+
+-- bonus la duración promedio más larga --
+SELECT c.name AS category_name, AVG(f.length) AS average_running_time
+FROM category AS c
+JOIN film_category AS fc ON c.category_id = fc.category_id
+JOIN film AS f ON fc.film_id = f.film_id
+GROUP BY c.name
+ORDER BY average_running_time DESC;
+
+-- Bonus - Las 10 películas más alquiladas --
+SELECT f.title, COUNT(r.rental_id) AS rental_count
+FROM film AS f
+JOIN inventory AS i ON f.film_id = i.film_id
+JOIN rental AS r ON i.inventory_id = r.inventory_id
+GROUP BY f.title
+ORDER BY rental_count DESC
+LIMIT 10;
+
+-- bonus ¿Se puede alquilar "Academy Dinosaur" en la Tienda 1? --
+SELECT f.title, i.store_id, COUNT(i.inventory_id) AS copies_available
+FROM film AS f
+JOIN inventory AS i ON f.film_id = i.film_id
+WHERE f.title = 'Academy Dinosaur' AND i.store_id = 1
+GROUP BY f.title, i.store_id;
+
+-- Bonus Lista de títulos y su disponibilidad --
+SELECT DISTINCT f.title,
+    CASE 
+        WHEN i.inventory_id IS NULL THEN 'NOT available'
+        ELSE 'Available'
+    END AS availability_status
+FROM film AS f
+LEFT JOIN inventory AS i ON f.film_id = i.film_id;