Database: driving_school
Question: How long is the total lesson time took by customer with first name as Rylan and last name as Goodwin?
SQL:
SELECT sum(T1.lesson_time) FROM Lessons AS T1 JOIN Customers AS T2 ON T1.customer_id  = T2.customer_id WHERE T2.first_name = "Rylan" AND T2.last_name = "Goodwin";