Hans Hartmann ขับรถเมื่อไหร่?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
When did Hans Hartmann drive?It is not neccessary to use all the tables.
 table_75423:  "Year" [ real]  "Event" [ text]  "Venue" [ text]  "Driver" [ text]  "Result" [ text]  "Category" [ text]  "Report" [ text] 
SELECT COUNT("Year") FROM table_75423 WHERE "Driver" = 'hans hartmann'