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+-- 1.Display all available tables in the Sakila database.
+SHOW tables;
+
+-- 2.Retrieve all the data from the tables actor, film and customer.
+SELECT * FROM actor;
+
+SELECT * FROM film;
+
+SELECT * FROM customer;
+
+-- 3.Retrieve the following columns from their respective tables:
+-- 3.1 Titles of all films from the film table
+SELECT title FROM film;
+-- 3.2 List of languages used in films, with the column aliased as language from the language table
+SELECT name AS language FROM language;
+-- 3.3 List of first names of all employees from the staff table
+SELECT first_name AS staff FROM staff;
+
+-- 4.Retrieve unique release years.
+SELECT DISTINCT release_year FROM film;
+
+-- 5.Counting records for database insights:
+-- 5.1 Determine the number of stores that the company has.
+SELECT COUNT(DISTINCT store_id)
+FROM store;
+-- 5.2 Determine the number of employees that the company has.
+SELECT COUNT(DISTINCT staff_id)
+FROM staff;
+-- 5.3 Determine how many films are available for rent and how many have been rented.
+SELECT
+(
+    SELECT COUNT(DISTINCT film_id)
+    FROM inventory
+) AS available_films,
+
+(
+    SELECT COUNT(DISTINCT i.film_id)
+    FROM rental r
+    JOIN inventory i
+        ON r.inventory_id = i.inventory_id
+) AS rented_films;
+-- 5.4 Determine the number of distinct last names of the actors in the database.
+SELECT COUNT(DISTINCT last_name)
+FROM actor;
+
+-- 6.Retrieve the 10 longest films.
+SELECT film_id,title,length
+FROM film
+ORDER BY length DESC
+LIMIT 10;
+
+
+-- 7.Use filtering techniques in order to:
+-- 7.1 Retrieve all actors with the first name "SCARLETT".
+SELECT
+    actor_id,
+    first_name,
+    last_name
+FROM actor
+WHERE first_name = 'SCARLETT';
+-- 7.2 Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes.
+-- Hint: use LIKE operator. More information here.
+SELECT
+    film_id,
+    title,
+    length
+FROM film
+WHERE title LIKE '%ARMAGEDDON%'
+  AND length > 100;
+-- 7.3 Determine the number of films that include Behind the Scenes content
+SELECT
+    film_id,
+    title,
+    special_features
+FROM film
+WHERE special_features LIKE '%Behind the Scenes%';
+
+SELECT COUNT(*) AS number_of_films
+FROM film
+WHERE special_features LIKE '%Behind the Scenes%';
+