รถนิสสันรุ่นใดในปี 2550?ไม่จำเป็นต้องใช้ตารางทั้งหมด
Which class had a vehicle of Nissan in 2007?It is not neccessary to use all the tables.
 table_name_31:  (class [ VARCHAR ] vehicle [ VARCHAR ] year [ VARCHAR) ]
SELECT class FROM table_name_31 WHERE vehicle = "nissan" AND year = 2007