solved lab

sakila.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 film.title FROM sakila.film;
+
+-- 3.2 List of languages used in films, with the column aliased as language from the language table
+SELECT l.name AS language
+FROM sakila.language AS l
+JOIN sakila.film AS f
+ON f.language_id = l.language_id;
+
+-- 3.3 List of first names of all employees from the staff table
+SELECT s.first_name, s.last_name FROM sakila.staff AS s;
+
+-- 4. Retrieve unique release years.
+SELECT DISTINCT f.release_year FROM sakila.film AS f;
+
+-- 5. Counting records for database insights:
+-- 5.1 Determine the number of stores that the company has.
+SELECT COUNT(st.store_id) FROM sakila.store AS st;
+
+-- 5.2 Determine the number of employees that the company has.
+SELECT COUNT(s.staff_id) FROM sakila.staff AS s;
+-- 5.3 Determine how many films are available for rent and how many have been rented.
+-- check table and column information to see which columns I need
+SELECT * FROM sakila.rental;
+
+
+SELECT COUNT(r.inventory_id) 
+FROM sakila.rental AS r
+WHERE r.return_date IS NULL;
+
+(SELECT COUNT(r.inventory_id) FROM sakila.rental AS r
+WHERE r.return_date IS NOT NULL);
+
+-- 5.4 Determine the number of distinct last names of the actors in the database.
+SELECT COUNT(DISTINCT a.last_name) FROM sakila.actor AS a;
+
+-- 6. Retrieve the 10 longest films.
+SELECT f.title, f.length FROM sakila.film AS f
+ORDER BY f.length DESC
+LIMIT 10;
+
+-- 7. Use filtering techniques in order to:
+-- 7.1 Retrieve all actors with the first name "SCARLETT".
+SELECT a.first_name, a.last_name 
+FROM sakila.actor AS a
+WHERE a.first_name = "SCARLETT";
+
+-- BONUS:
+-- 7.2 Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes.
+-- Hint: use LIKE operator.
+-- checking table to see how values are displayed
+SELECT * FROM sakila.film;
+
+SELECT * FROM sakila.film AS f
+WHERE f.length >= 100 AND f.title LIKE '%ARMAGEDDON%'; 
+
+-- 7.3 Determine the number of films that include Behind the Scenes content
+SELECT count(film_id) FROM sakila.film AS f
+WHERE f.special_features LIKE '%Behind the Scenes%';
+
+
+