[lab-sql-2] Sara

[lab-sql-2] Sara.sql

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+-- DA PT 2023 
+-- Sara Ferreira da Silva
+
+-- 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?
+-- There are 4851 movies available
+select *
+from sakila.inventory
+select count(inventory_id) 
+from sakila.inventory;
+
+-- 4. How many films have been rented?
+-- There were rented 16044 movies
+select *
+from sakila.rental
+select count(rental_id) 
+from sakila.rental;
+
+-- 5. What is the shortest and longest rental period?
+-- Longest is 10 days // 221 hours // 13319 min
+-- Shortest is 0 days // 18 hours // 1080 min 
+
+-- In days
+select max(datediff(return_date, rental_date)) AS rental_period_in_days
+from sakila.rental; 
+select min(datediff(return_date, rental_date)) AS rental_period_in_days
+from sakila.rental; 
+
+-- In hours
+select timestampdiff(hour, rental_date, return_date) AS rental_period_in_hours
+from sakila.rental
+select max(timestampdiff(hour, rental_date, return_date)) AS rental_period_in_hours
+from sakila.rental
+select min(timestampdiff(hour, rental_date, return_date)) AS rental_period_in_hours
+from sakila.rental
+
+-- In seconds
+select timestampdiff(minute, rental_date, return_date) AS rental_period_in_minutes
+from sakila.rental
+select max(timestampdiff(minute, rental_date, return_date)) AS rental_period_in_minute
+from sakila.rental
+select min(timestampdiff(minute, rental_date, return_date)) AS rental_period_in_minute
+from sakila.rental
+
+-- 6. What are the shortest and longest movie duration? Name the values max_duration and min_duration.
+-- Max: 185 // Min: 46 
+select*
+from sakila.film
+select max(length) as max_duration, min(length) as min_duration
+from sakila.film;
+
+-- 7. What's the average movie duration?
+-- The average is 115,2720 min. duration
+select avg(length)
+from sakila.film;
+
+-- 8. What's the average movie duration expressed in format (hours, minutes)?
+-- The average is 1 hour, 55 minutes, 16 seconds and 32 microseconds
+select sec_to_time(avg(length * 60)) as length_h_m
+FROM sakila.film;
+
+-- 9. How many movies are longer than 3 hours?
+-- Note: 3 hours is 180 min
+-- There are 39 movies longer than 3 hours 
+select count(*) as movies_longer_than_3_hours
+from sakila.film
+where length > 180
+
+-- 10. Get the name and email formatted. Example: Mary SMITH - mary.smith@sakilacustomer.org.
+select concat(first_name, ' ', last_name, ' - ', email) as customer_identification
+from sakila.customer;
+
+-- 11. What's the length of the longest film title?
+-- It is 27 caracters: ARACHNOPHOBIA ROLLERCOASTER
+select max(length(title)) as max_film_title_length
+from sakila.film;
+
+select max(char_length(title)) as max_film_title_length,
+substring_index(group_concat(title order by char_length(title) desc), ',', 1) as longest_film_title
+from sakila.film;