Graham Hill รอบต่ำสุดคือเท่าไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What are the lowest laps of Graham Hill?It is not neccessary to use all the tables.
 table_name_68:  (laps [ INTEGER ] driver [ VARCHAR) ]
SELECT MIN(laps) FROM table_name_68 WHERE driver = "graham hill"