ผู้ผลิตรายใดมีการจัดล้อ 4-6-6-4 และคลาส z-7?ไม่จำเป็นต้องใช้ทุกโต๊ะ
What manufacturer has a wheel arrangement of 4-6-6-4 and a Class of z-7?It is not neccessary to use all the tables.
 table_name_34:  (manufacturer [ VARCHAR ] wheel_arrangement [ VARCHAR ] class [ VARCHAR) ]
SELECT manufacturer FROM table_name_34 WHERE wheel_arrangement = "4-6-6-4" AND class = "z-7"