diff --git a/lab_basic_queries.sql b/lab_basic_queries.sql new file mode 100644 index 0000000..4d929a8 --- /dev/null +++ b/lab_basic_queries.sql @@ -0,0 +1,49 @@ +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(*) AS number_stores FROM sakila.store; +-- 5.2 Determine the number of employees that the company has. +SELECT COUNT(*) AS number_employees FROM sakila.staff; +-- 5.3 Determine how many films are available for rent and how many have been rented. +SELECT COUNT(DISTINCT inventory_id) AS available_films FROM sakila.inventory; +SELECT COUNT(DISTINCT inventory_id) AS films_rented FROM sakila.rental; +-- 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, length FROM sakila.film +ORDER BY length DESC +LIMIT 10; + +-- 7. Use filtering techniques in order to: +-- 7.1 Retrieve all actors with the first name "SCARLETT". +SELECT actor_id, first_name FROM sakila.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 sakila.film +WHERE title LIKE '%ARMAGEDON%' AND length>100; +-- Hint: use LIKE operator. More information here. +-- 7.3. Determine the number of films that include Behind the Scenes content. +SELECT COUNT(film_id) FROM sakila.film +WHERE special_features='Behind the Scenes'; \ No newline at end of file