Context: CREATE TABLE Lessons (vehicle_id VARCHAR); CREATE TABLE Vehicles (vehicle_id VARCHAR, vehicle_details VARCHAR)
Question: What is the id and detail of the vehicle used in lessons for most of the times?
Answer: SELECT T1.vehicle_id, T1.vehicle_details FROM Vehicles AS T1 JOIN Lessons AS T2 ON T1.vehicle_id = T2.vehicle_id GROUP BY T1.vehicle_id ORDER BY COUNT(*) DESC LIMIT 1