Solved lab

joins_lab.sql

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+USE sakila;
+
+-- JOINING TABLES
+
+-- 1. List the number of films per category.
+SELECT * FROM category;
+SELECT * FROM film_category;
+
+
+SELECT
+    cn.name AS film_category,
+    COUNT(*) AS number_of_films
+FROM category AS cn
+JOIN film_category AS fc
+    ON cn.category_id = fc.category_id
+GROUP BY cn.name
+ORDER BY film_category;
+
+-- 2. Retrieve the store ID, city, and country for each store.
+SELECT 
+	st.store_id,
+    ci.city,
+    co.country
+FROM store AS st
+JOIN address AS ad
+	ON st.address_id = ad.address_id
+JOIN city AS ci
+	ON ad.city_id = ci.city_id
+JOIN country AS co
+	ON ci.country_id = co.country_id;
+
+-- 3. Calculate the total revenue generated by each store in dollars.
+SELECT
+	st.store_id,
+    SUM(pa.amount) as total_store_revenue
+FROM store AS st
+JOIN customer AS cu
+	ON st.store_id= cu.store_id
+JOIN payment AS pa
+	ON cu.customer_id = pa.customer_id
+GROUP BY st.store_id;
+
+SELECT
+	st.store_id,
+    ad.address,
+    SUM(pa.amount) as total_store_revenue
+FROM store AS st
+JOIN address AS ad
+	ON st.address_id = ad.address_id
+JOIN customer AS cu
+	ON st.store_id= cu.store_id
+JOIN payment AS pa
+	ON cu.customer_id = pa.customer_id
+GROUP BY st.store_id, ad.address;
+
+-- 4. Determine the average running time of films for each category.
+SELECT
+	cn.name as film_category,
+    SUM(f.length) AS running_time
+FROM category AS cn
+JOIN film_category AS fc
+	ON cn.category_id = fc.category_id
+JOIN film AS f
+	ON fc.film_id = f.film_id
+GROUP BY cn.name
+ORDER BY film_category;
+
+-- BONUS
+-- 5. Identify the film categories with the longest average running time.
+
+
+-- 6. Display the top 10 most frequently rented movies in descending order.
+
+
+-- 7. Determine if "Academy Dinosaur" can be rented from Store 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."