lab solved

Lab-sql-join.sql

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+USE sequila;
+
+## 1 ##
+SELECT f.title, c.name 
+FROM film AS f
+JOIN film_category AS fc
+ON f.film_id = fc.film_id
+JOIN category AS c
+ON fc.category_id = c.category_id; 
+
+## 2 ##
+SELECT s.store_id, c.city, co.country 
+FROM store AS s
+JOIN address AS a
+ON s.address_id = a.address_id
+JOIN city AS c
+ON a.city_id = c.city_id
+JOIN country AS co
+ON c.country_id = co.country_id;
+
+## 3 ##
+SELECT s.store_id, SUM(p.amount)
+FROM store AS s
+JOIN customer AS c
+ON s.store_id = c.store_id
+JOIN payment AS p
+ON c.customer_id = p.customer_id
+GROUP BY s.store_id
+;
+
+## 4 ##
+SELECT c.name, round(AVG(f.length),2)
+FROM film AS f
+JOIN film_category AS fc
+ON f.film_id = fc.film_id
+JOIN category AS c
+ON fc.category_id = c.category_id
+GROUP BY c.name
+;
+
+
+