diff --git a/Lab_3.2_solved.sql b/Lab_3.2_solved.sql new file mode 100644 index 0000000..9c6ce09 --- /dev/null +++ b/Lab_3.2_solved.sql @@ -0,0 +1,75 @@ +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 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 +WHERE store_id IS NOT NULL; + +-- 5.2 Determine the number of employees that the company has. +SELECT COUNT(staff_id) FROM sakila.staff; + + +-- 5.3 Determine how many films are available for rent and how many have been rented. +SELECT * from sakila.inventory +SELECT * FROM sakila.rental + +SELECT COUNT(*) AS total_copies_available +FROM inventory; + +SELECT COUNT(inventory_id) AS total_rentals +FROM rental; + +SELECT + (SELECT COUNT(*) FROM inventory) AS total_copies_available, + (SELECT COUNT(inventory_id) FROM rental) AS total_rentals + +-- 5.4 Determine the number of distinct last names of the actors in the database. + +SELECT COUNT(DISTINCT last_name) from sakila.actor; + +-- 6 Retrieve the 10 longest films. +SELECT title FROM sakila.film +ORDER BY length DESC +LIMIT 10; + +-- Use filtering techniques in order to: +-- 7.1 Retrieve all actor with the first name "SCARLETT". +Select first_name 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 +WHERE title LIKE '%ARMAGEDDON%'AND length > 100 + +-- 7.3 Determine the number of films that include Behind the Scenes content +SELECT COUNT(*) FROM sakila.film +WHERE special_features LIKE '%Behind the Scenes%'; +