Hans Hartmann ขับรถเมื่อไหร่?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
When did Hans Hartmann drive?It is not neccessary to use all the tables.
 table_name_42:  (year [ VARCHAR ] driver [ VARCHAR) ]
SELECT COUNT(year) FROM table_name_42 WHERE driver = "hans hartmann"