diff --git a/Lab_SQL_basic_queries.sql b/Lab_SQL_basic_queries.sql new file mode 100644 index 0000000..71214e2 --- /dev/null +++ b/Lab_SQL_basic_queries.sql @@ -0,0 +1,45 @@ +USE sakila; +-- Display all tables: +SHOW TABLES; +-- Retrieve all the data from the tables actor, film and customer +SELECT * FROM actor; +SELECT * FROM film; +SELECT * FROM customer; +-- Retrieve the following columns from their respective tables +-- 3.1 Titles of all films from the film table +-- 3.2 List of languages used in films, with the column aliased as language from the language table +-- 3.3 List of first names of all employees from the staff table +SELECT title FROM film; +SELECT name AS language FROM language; +SELECT first_name FROM staff; +-- Retrieve unique release years +SELECT DISTINCT release_year FROM film; +-- Counting records for database insights: +-- 5.1 Determine the number of stores that the company has. +-- 5.2 Determine the number of employees that the company has. +-- 5.3 Determine how many films are available for rent and how many have been rented. +-- 5.4 Determine the number of distinct last names of the actors in the database. +SELECT COUNT(DISTINCT store_id) FROM store; +SELECT COUNT(DISTINCT staff_id) FROM staff; +SELECT COUNT(DISTINCT film_id) FROM inventory; +SELECT COUNT(DISTINCT inventory.film_id) +FROM rental +JOIN inventory +ON rental.inventory_id = inventory.inventory_id; +SELECT COUNT(DISTINCT last_name) FROM actor; +-- Retrieve the 10 longest films +SELECT title, length FROM film +ORDER BY length DESC LIMIT 10; +-- Use filtering techniques in order to: +-- 7.1 Retrieve all actors with the first name "SCARLETT". +SELECT first_name, last_name FROM actor +WHERE first_name = "SCARLETT"; +-- 7.2 Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes. +-- Hint: use LIKE operator. More information here. +-- 7.3 Determine the number of films that include Behind the Scenes content +SELECT title, length FROM film +WHERE title LIKE "%ARMAGEDDON%" AND length > 100; +SELECT COUNT(title) FROM film +WHERE special_features LIKE "%Behind the Scenes%"; + +