[Lab_SQL_2]FilipaA

[SQL_2]FIlipaAmado.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(inventory_id)
+from sakila.inventory;
+
+
+-- How many films have been rented?
+-- first i checked if the date had hours because if it hadnt it could be that it wasnt counting the rentals and just the days where there wa renting of movies ocurring
+select distinct (rental_date)
+from sakila.rental;
+-- now do he counting 
+select count(rental_date) 
+from sakila.rental;
+
+
+-- What is the shortest and longest rental period?
+select rental_date, return_date
+from sakila.rental
+;
+
+
+-- after doing this i realized there is a column in table film for rental_duration
+select max(timestampdiff(minute, rental_date, return_date)) as max_rental_period
+from sakila.rental
+;
+
+-- the maximum rental periodo is 7 days
+select max(rental_duration) as longest_rental_period
+from sakila.film
+;
+-- the minimum rental period is 3 days
+select min(rental_duration) as shortest_rental_period
+from sakila.film
+;
+
+
+-- What are the shortest and longest movie duration? Name the values max_duration and min_duration.
+-- the maximum duration of a film is 185 min 
+select max(length) as max_duration
+from sakila.film;
+
+-- the minimum duration of a film is 46 min 
+select min(length) as min_duration
+from sakila.film;
+
+
+-- What's the average movie duration
+-- the average movie duration is 115
+select round(avg(length),0) as average_movie_duration
+from sakila.film
+;
+
+
+-- What's the average movie duration expressed in format (hours, minutes)?
+select sec_to_time(avg(length)*60) as average_movie_duration_h
+from sakila.film
+;
+
+
+
+-- How many movies longer than 3 hours?
+select count(length) total_movies
+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, length(first_name))),' ', last_name ,' - ', lower(email)) as name_and_email
+from sakila.customer;
+
+
+
+
+-- What's the length of the longest film title?
+-- the longest movie tittle is arachnophobia rollercoaster with 2h e 27 min 
+select title, sec_to_time(length*60)
+from sakila.film
+order by length(title) desc
+limit 1;
+