lab_sql_subqueries

OneDrive/Desktop/sql_subqueries/lab_sql_subqueries.sql

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+-- LAB SQL SUBQUERIES
+USE sakila;
+
+SELECT 
+    title,
+    rental_rate
+FROM film
+WHERE rental_rate > (
+    SELECT AVG(rental_rate)
+    FROM film
+);
+
+
+
+
+SELECT 
+    customer_id,
+    COUNT(rental_id) AS total_rentals
+FROM rental
+GROUP BY customer_id
+HAVING COUNT(rental_id) > (
+    SELECT AVG(rental_count)
+    FROM (
+        SELECT COUNT(rental_id) AS rental_count
+        FROM rental
+        GROUP BY customer_id
+    ) AS sub
+);
+
+SELECT 
+    f.title,
+    COUNT(r.rental_id) AS times_rented
+FROM film f
+JOIN inventory i 
+    ON f.film_id = i.film_id
+JOIN rental r 
+    ON i.inventory_id = r.inventory_id
+GROUP BY f.title
+HAVING COUNT(r.rental_id) > (
+    SELECT AVG(rental_count)
+    FROM (
+        SELECT COUNT(*) AS rental_count
+        FROM rental r
+        JOIN inventory i 
+            ON r.inventory_id = i.inventory_id
+        GROUP BY i.film_id
+    ) AS sub
+)
+ORDER BY times_rented DESC;
+
+
+
+SELECT 
+    c.customer_id,
+    CONCAT(c.first_name, ' ', c.last_name) AS full_name,
+    SUM(p.amount) AS total_spent
+FROM customer c
+JOIN payment p 
+    ON c.customer_id = p.customer_id
+GROUP BY c.customer_id
+HAVING SUM(p.amount) > (
+    SELECT AVG(customer_total)
+    FROM (
+        SELECT SUM(amount) AS customer_total
+        FROM payment
+        GROUP BY customer_id
+    ) AS sub
+)
+ORDER BY total_spent DESC;
+
+