[sql-2] Laura

[sql-2] Laura.sql

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+-- 1. Select all the actors with the first name ‘Scarlett’.
+select *
+from sakila.actor
+where first_name = 'Scarlett'
+;
+
+-- 2. Select all the actors with the last name ‘Johansson’.
+select *
+from sakila.actor
+where last_name = 'Johansson'
+;
+
+-- 3. How many films (movies) are available for rent?
+select count(inventory_id) as number_of_movies
+from sakila.inventory
+;
+-- 4.581 movies are available
+
+-- 4. How many films have been rented?
+-- 16.044 rentals have been made until this point
+
+-- 5. What is the shortest and longest rental period?
+select timestampdiff(day, rental_date, return_date) as rental_duration
+from sakila.rental
+;
+
+select min(rental_duration) as min_rental
+from sakila.film
+;
+select max(rental_duration) as max_rental
+from sakila.film
+;
+-- min = 3 days; max = 7 days
+
+-- 6. What are the shortest and longest movie duration? Name the values max_duration and min_duration.
+select max(length) as max_duration
+from sakila.film
+;
+
+select min(length) as min_duration
+from sakila.film
+;
+-- min = 46 days; max = 185 minutes
+
+-- 7. What's the average movie duration?
+select round(avg(length),2) as avg_length_movie
+from sakila.film
+;
+-- The avg. length of the movies are 115.27 minutes
+
+-- 8. What's the average movie duration expressed in format (hours, minutes)?
+select sec_to_time(avg(length)*60) as avg_length_movie
+from sakila.film
+;
+-- The avg. length of a movies is 01:55 (hh:mm)
+
+-- 9. How many movies are longer than 3 hours?
+select count(*) as long_duration_movie
+from sakila.film
+where length > 180
+;
+-- 39 movies are over 3 h long
+
+-- 10. Get the name and email formatted. Example: Mary SMITH - mary.smith@sakilacustomer.org.
+select *, concat(lower(first_name),' ', last_name, ' - ', lower(email)) as customer_details
+from sakila.customer
+;
+
+-- 11. What's the length of the longest film title?
+select max(length(title)) as longest_title
+from sakila.film
+;
+-- the title with 27 characters is the longest!