[lab-sql-2]Leonardo

lab | SQL queries 2.sql

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+-- Select all the actors with the first name ‘Scarlett’.
+SELECT *
+FROM sakila.actor
+WHERE first_name = 'SCARLETT';
+
+-- Select all the actors with the last name ‘Johansson’.
+SELECT *
+FROM sakila.actor
+WHERE last_name = 'JOHANSSON';
+
+-- How many films (movies) are available for rent?
+SELECT COUNT(*) AS available_for_rent
+FROM sakila.inventory;
+
+-- How many films have been rented?
+SELECT COUNT(*) AS films_rented
+FROM sakila.rental;
+
+-- What is the shortest and longest rental period?
+SELECT MIN(TIMEDIFF(return_date, rental_date)) AS shortest_rental_in_hrs
+FROM sakila.rental;
+
+SELECT MAX(TIMEDIFF(return_date, rental_date)) AS longest_rental_in_hrs
+FROM sakila.rental;
+
+-- What are the shortest and longest movie durations? 
+-- Name the values max_duration and min_duration.
+SELECT MAX(length) AS max_duration_in_min
+FROM sakila.film;
+
+SELECT MIN(length) AS min_duration_in_min
+FROM sakila.film;
+
+-- What's the average movie duration?
+SELECT AVG(length) AS average_duration_in_min
+FROM sakila.film;
+
+-- What's the average movie duration expressed in format (hours, minutes)?
+SELECT TIME_FORMAT(SEC_TO_TIME(AVG(length * 60)), '%H:%i') AS average_duration
+FROM sakila.film;
+
+-- How many movies longer than 3 hours?
+SELECT COUNT(*) AS n_over_three_hrs 
+FROM sakila.film
+WHERE length >= 180;
+
+-- Get the name and email formatted. 
+-- Example: Mary SMITH - mary.smith@sakilacustomer.org.
+SELECT CONCAT(
+    UPPER(SUBSTRING(first_name, 1, 1)),
+    LOWER(SUBSTRING(first_name, 2)),
+    ' ',
+    '-',
+    ' ',
+    UPPER(last_name),
+    ' ',
+    LOWER(email)
+) AS formatted
+FROM sakila.customer;
+
+-- What's the length of the longest film title?
+SELECT MAX(length)
+FROM sakila.film;