Solved lab

solutions.sql

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+-- solutions.sql
+-- SQL Basic Queries Lab (Sakila)
+
+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, 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(*) AS number_of_stores
+FROM store;
+
+-- 5.2 Determine the number of employees that the company has.
+SELECT COUNT(*) AS number_of_employees
+FROM staff;
+
+-- 5.3 Determine how many films are available for rent and how many have been rented.
+
+-- Available for rent (inventory items)
+SELECT COUNT(*) AS available_for_rent_inventory_items
+FROM inventory;
+
+-- Total rentals
+SELECT COUNT(*) AS total_rentals
+FROM rental;
+
+-- 5.4 Determine the number of distinct last names of the actors in the database.
+SELECT COUNT(DISTINCT last_name) AS distinct_actor_last_names
+FROM actor;
+
+-- 6) Retrieve the 10 longest films.
+SELECT title, length
+FROM film
+ORDER BY length DESC, title ASC
+LIMIT 10;
+
+-- 7) Filtering techniques:
+
+-- 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
+ORDER BY length DESC;
+
+-- 7.3 Determine the number of films that include Behind the Scenes content.
+SELECT COUNT(*) AS films_with_behind_the_scenes
+FROM film
+WHERE FIND_IN_SET('Behind the Scenes', special_features) > 0;
+