Solved

lab-sql-joins.sql

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+SHOW TABLES;
+SELECT * FROM actor;
+SELECT * FROM film;
+SELECT * FROM customer;
+SELECT title FROM film;
+SELECT 
+    c.name AS category_name,
+    COUNT(f.film_id) AS number_of_films
+FROM 
+    category c
+JOIN 
+    film_category fc ON c.category_id = fc.category_id
+JOIN 
+    film f ON fc.film_id = f.film_id
+GROUP BY 
+    c.name
+ORDER BY 
+    number_of_films DESC;
+    SELECT 
+    s.store_id,
+    ci.city,
+    co.country
+FROM 
+    store s
+JOIN 
+    address a ON s.address_id = a.address_id
+JOIN 
+    city ci ON a.city_id = ci.city_id
+JOIN 
+    country co ON ci.country_id = co.country_id;
+
+    SELECT 
+    s.store_id,
+    SUM(p.amount) AS total_revenue
+FROM 
+    payment p
+JOIN 
+    rental r ON p.rental_id = r.rental_id
+JOIN 
+    inventory i ON r.inventory_id = i.inventory_id
+JOIN 
+    store s ON i.store_id = s.store_id
+GROUP BY 
+    s.store_id
+ORDER BY 
+    total_revenue DESC;
+    SELECT 
+    c.name AS category_name,
+    AVG(f.length) AS average_running_time
+FROM 
+    category c
+JOIN 
+    film_category fc ON c.category_id = fc.category_id
+JOIN 
+    film f ON fc.film_id = f.film_id
+GROUP BY 
+    c.name
+ORDER BY 
+    average_running_time DESC;
+SELECT 
+    c.name AS category_name,
+    AVG(f.length) AS average_running_time
+FROM 
+    category c
+JOIN 
+    film_category fc ON c.category_id = fc.category_id
+JOIN 
+    film f ON fc.film_id = f.film_id
+GROUP BY 
+    c.name
+ORDER BY 
+    average_running_time DESC
+LIMIT 10;
+SELECT 
+    f.title,
+    COUNT(r.rental_id) AS rental_count
+FROM 
+    rental r
+JOIN 
+    inventory i ON r.inventory_id = i.inventory_id
+JOIN 
+    film f ON i.film_id = f.film_id
+GROUP BY 
+    f.title
+ORDER BY 
+    rental_count DESC
+LIMIT 10;
+SELECT 
+    CASE 
+        WHEN COUNT(i.inventory_id) > 0 THEN 'Available'
+        ELSE 'NOT Available'
+    END AS availability
+FROM 
+    film f
+JOIN 
+    inventory i ON f.film_id = i.film_id
+WHERE 
+    f.title = 'Academy Dinosaur' 
+    AND i.store_id = 1
+    AND i.inventory_id NOT IN (
+        SELECT inventory_id 
+        FROM rental 
+        WHERE return_date IS NULL
+    );
+