Lab solved

Lab_3.2_solved.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 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%';
+