Sakila 1st lab completed

sakila_solutions.sql

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+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;
+
+# 3.1 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(*) AS store_count
+FROM store;
+
+# 5.2 Determine the number of employees that the company has.
+SELECT COUNT(*) AS employee_count
+FROM staff;
+
+# 5.3 Determine how many films are available for rent and how many have been rented.
+SELECT
+  (SELECT COUNT(*) FROM inventory) AS available_for_rent,
+  (SELECT COUNT(*) FROM rental)    AS rented;
+
+# if the question is about finding the films that have been rented from all, at least one time, and not the amount of total rentals:
+SELECT COUNT(DISTINCT i.film_id) AS films_rented_at_least_once
+FROM rental r
+JOIN inventory i ON i.inventory_id = r.inventory_id;
+
+# 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 film_id, title, length
+FROM film
+ORDER BY length DESC, title
+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 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 COUNT(*) AS films_with_behind_the_scenes
+FROM film
+WHERE FIND_IN_SET('Behind the Scenes', special_features) > 0;
+
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