SQL Joins Lab

lab-sql-joins.sql

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+USE sakila;
+
+-- 1. List the number of films per category.
+SELECT * FROM film;
+SELECT * FROM inventory;
+SELECT * FROM film_category;
+
+SELECT 
+    name, COUNT(film_id) AS category_count
+FROM
+    film_category AS f
+        JOIN
+    category AS c ON f.category_id = c.category_id
+GROUP BY name;
+
+-- 2. Retrieve the store ID, city, and country for each store.
+SELECT 
+    s.store_id, c.city, co.country
+FROM
+    store AS s
+        JOIN
+    address AS a ON s.address_id = a.address_id
+        JOIN
+    city AS c ON a.city_id = c.city_id
+        JOIN
+    country AS co ON c.country_id = co.country_id;
+
+-- 3. Calculate the total revenue generated by each store in dollars.
+SELECT 
+    *
+FROM
+    payment;
+
+SELECT 
+    s.store_id, SUM(p.amount) AS total_revenue
+FROM
+    store AS s
+        JOIN
+    customer AS C ON s.store_id = c.store_id
+        JOIN
+    payment AS p ON c.customer_id = p.customer_id
+GROUP BY store_id;
+
+-- 4. Determine the average running time of films for each category.
+SELECT 
+    c.name, ROUND(AVG(f.length), 2) AS avg_film_length
+FROM
+    film AS f
+        JOIN
+    film_category AS fc ON f.film_id = fc.film_id
+        JOIN
+    category AS c ON fc.category_id = c.category_id
+GROUP BY name;
+
+-- 5. Identify the film categories with the longest average running time.
+SELECT 
+    c.name, ROUND(AVG(f.length), 2) AS avg_film_length
+FROM
+    film AS f
+        JOIN
+    film_category AS fc ON f.film_id = fc.film_id
+        JOIN
+    category AS c ON fc.category_id = c.category_id
+GROUP BY name
+ORDER BY avg_film_length DESC
+LIMIT 5;
+
+-- 6. Display the top 10 most frequently rented movies in descending order.
+SELECT * FROM film;
+SELECT * FROM rental;
+
+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 title
+ORDER BY rental_count DESC
+LIMIT 10;
+
+-- 7. Determine if "Academy Dinosaur" can be rented from Store 1.
+SELECT 
+    f.title, i.store_id
+FROM
+    film AS f
+        JOIN
+    inventory AS i ON f.film_id = i.film_id
+WHERE
+    store_id = '1'
+        AND title = 'Academy Dinosaur';
+
+-- 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 * from inventory;
+
+SELECT DISTINCT
+    (f.title),
+    CASE
+        WHEN i.film_id IS NULL THEN 'NOT Available'
+        ELSE 'Available'
+    END 'Availability'
+FROM
+    film AS f
+        LEFT JOIN
+    inventory AS i ON f.film_id = i.film_id;