Solved lab

sakila_basic.sql

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+-- 1. Display all available tables in the Sakila database
+USE sakila;
+SHOW TABLES;
+
+-- 2. Retrieve all the data from the tables 'actor', 'film' and 'customer'.
+
+SELECT * FROM sakila.actor;
+SELECT * FROM sakila.film;
+SELECT * FROM sakila.customer;
+
+-- 3. Retrieve the following columns from their respective tables:
+-- 3.1 Titles of all films from the `film` table
+
+SELECT title
+FROM sakila.film;
+
+-- 3.2 List of languages used in films, with the column aliased as `language` from the `language` table
+
+SELECT name as language
+FROM sakila.language;
+
+-- 3.3 List of first names of all employees from the `staff` table
+
+SELECT first_name 
+FROM sakila.staff;
+
+-- 4. Retrieve unique release years.
+SELECT DISTINCT(release_year)
+FROM sakila.film;
+
+-- 5. Counting records for database insights:
+-- 5.1 Determine the number of stores that the company has.
+SELECT COUNT(store_id) 
+FROM sakila.store;
+
+-- 5.2 Determine the number of employees that the company has.
+SELECT * FROM sakila.staff;
+SELECT SUM(active)
+FROM sakila.staff;
+
+-- 5.3 Determine how many films are available for rent and how many have been rented.
+SELECT COUNT(*) AS films_available
+FROM sakila.inventory;
+
+SELECT COUNT(*) AS films_rented
+FROM sakila.rental;
+
+-- 5.4 Determine the number of distinct last names of the actors in the database.
+SELECT *
+FROM sakila.actor;
+SELECT DISTINCT(last_name)
+FROM sakila.actor;
+
+-- 6. Retrieve the 10 longest films.
+SELECT * FROM sakila.film;
+
+SELECT *
+FROM sakila.film
+ORDER BY length DESC
+LIMIT 10;
+
+SELECT title, length
+FROM sakila.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 sakila.actor;
+
+SELECT * 
+FROM sakila.actor
+WHERE first_name = 'SCARLETT';
+
+-- 7.2 Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes. 
+SELECT * FROM sakila.film;
+SELECT * 
+FROM sakila.film
+WHERE title = 'ARMAGEDDON'
+  AND length > 100;
+
+-- 7.3 Determine the number of films that include Behind the Scenes content
+SELECT * FROM sakila.film;
+SELECT COUNT(*) AS films_with_behind_the_scenes
+FROM sakila.film
+WHERE special_features LIKE '%Behind the Scenes%';
+