[lab-stored-procedures] ignacio

[lab-stored-procedures] ignacio.sql

@@ -0,0 +1,55 @@
+use sakila;
+DROP PROCEDURE IF EXISTS select_action_customers;
+DELIMITER //
+CREATE PROCEDURE select_action_customers()
+BEGIN
+	select first_name, last_name, email
+	from customer
+	join rental on customer.customer_id = rental.customer_id
+	join inventory on rental.inventory_id = inventory.inventory_id
+	join film on film.film_id = inventory.film_id
+	join film_category on film_category.film_id = film.film_id
+	join category on category.category_id = film_category.category_id
+	where category.name = "Action"
+	group by first_name, last_name, email;
+END
+//
+DELIMITER ;
+CALL select_action_customers();
+
+-- -- -- -- -- -- -- -- 
+use sakila;
+DROP PROCEDURE IF EXISTS select_action_customers;
+DELIMITER //
+CREATE PROCEDURE select_action_customers(in cat varchar(30))
+BEGIN
+	select first_name, last_name, email
+	from customer
+	join rental on customer.customer_id = rental.customer_id
+	join inventory on rental.inventory_id = inventory.inventory_id
+	join film on film.film_id = inventory.film_id
+	join film_category on film_category.film_id = film.film_id
+	join category on category.category_id = film_category.category_id
+	where category.name = cat
+	group by first_name, last_name, email;
+END
+//
+DELIMITER ;
+CALL select_action_customers("Action");
+
+-- 
+DROP PROCEDURE IF EXISTS filter_film_cat;
+DELIMITER //
+CREATE PROCEDURE filter_film_cat(in number int)
+BEGIN
+select c.name, count(fc.film_id) as n_films
+from film_category fc
+join category c
+on fc.category_id = c.category_id
+group by c.name
+having n_films > number
+;
+END
+//
+DELIMITER ;
+CALL filter_film_cat(55);