Solved lab

sakila_queries.sql

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+-- LAB | SQL Basic Queries
+
+-- Select the database
+USE sakila;
+
+-- 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 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(store_id) AS total_stores FROM store;
+
+-- 5.2 Determine the number of employees that the company has.
+SELECT COUNT(staff_id) AS total_employees FROM staff;
+
+-- 5.3 Determine how many films are available for rent and how many have been rented.
+-- Total available films (assuming every film record is available unless rented):
+SELECT COUNT(film_id) AS total_films_available FROM film;
+-- Total films rented (count the records in the rental table):
+SELECT COUNT(rental_id) AS total_films_rented FROM rental;
+
+-- 5.4 Determine the number of distinct last names of the actors in the database.
+SELECT COUNT(DISTINCT last_name) AS unique_actor_last_names FROM actor;
+
+-- 6. Retrieve the 10 longest films.
+SELECT 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 * FROM actor
+WHERE first_name = 'SCARLETT';
+
+-- BONUS:
+-- 7.2 Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes.
+SELECT 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 COUNT(film_id) AS films_with_behind_the_scenes_content FROM film
+WHERE special_features LIKE '%Behind the Scenes%';