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";
How long is the total lesson time took by the customer named Rylan Goodwin?
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 '' ;
select sum ( t1 . lesson_time ) from lessons as t1 join customers as t2 on t1 . customer_id = t2 . customer_id where t2 . first_name = value and t2 . last_name = value
How long is the total lesson time took by the customer named Rylan Goodwin ?