w4 lab4 done

lab4.sql

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+
+USE sakila;
+
+# 1. List the number of films per category.
+SELECT name as category_name, fc.category_id, COUNT(film_id) as films_per_category
+FROM film_category as fc
+INNER JOIN category as c
+ON fc.category_id = c.category_id
+GROUP BY category_id;
+
+# 2. Retrieve the store ID, city, and country for each store.
+
+SELECT store_id, city, country
+FROM store
+INNER JOIN address
+ON store.address_id = address.address_id
+JOIN city
+ON address.city_id = city.city_id
+JOIN country
+ON city.country_id = country.country_id;
+
+
+# 3. Calculate the total revenue generated by each store in dollars.
+
+SELECT store.store_id, SUM(payment.amount) AS total_revenue
+FROM store
+JOIN staff ON store.store_id = staff.store_id
+JOIN payment ON staff.staff_id = payment.staff_id
+GROUP BY store.store_id;
+
+
+# 4. Determine the average running time of films for each category.
+
+SELECT  c.name as category_name, ROUND(AVG(length),2) as avg_film_lenght
+FROM film as f
+JOIN film_category as fc
+ON f.film_id = fc.film_id
+JOIN category c
+ON fc.category_id = c.category_id
+GROUP BY c.category_id;
+
+# 5. Identify the film categories with the longest average running time.
+
+SELECT  c.name as category_name, AVG(length) as avg_film_length
+FROM film as f
+JOIN film_category as fc
+ON f.film_id = fc.film_id
+JOIN category c
+ON fc.category_id = c.category_id
+GROUP BY c.category_id
+ORDER BY avg_film_length DESC; 
+
+# 6. Display the top 10 most frequently rented movies in descending order.
+
+SELECT title, COUNT(*) as rented_times
+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 title
+ORDER by rented_times desc
+Limit 10;
+
+
+# 7. Determine if "Academy Dinosaur" can be rented from Store 1.
+
+SELECT title, inventory_id, film.film_id, store_id
+FROM film
+JOIN inventory
+ON film.film_id = inventory.film_id
+WHERE title LIKE "Academy Dinosaur" AND store_id = 1;
+
+# 8. Provide a list of all distinct film titles, along with their availability status in the inventory. Include a column indicating whether each title is 'Available' or 
+#'NOT available.' 
+# Note that there are 42 titles that are not in the inventory, and this information can be obtained using a CASE statement combined with IFNULL."
+
+SELECT title,
+	CASE 
+		WHEN ISNULL(i.film_id) THEN "Not available"
+		ELSE "Available"
+	END AS film_availability
+FROM film as f
+LEFT JOIN inventory as i
+ON f.film_id = i.film_id
+GROUP BY f.film_id
+ORDER BY f.film_id ASC;
+