Minnesota Vikings มีคู่แข่งกี่คน?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many opponents are at Minnesota Vikings?It is not neccessary to use all the tables.
 table_18847736_2:  (opponents [ INTEGER ] opponent [ VARCHAR) ]
SELECT MAX(opponents) FROM table_18847736_2 WHERE opponent = "at Minnesota Vikings"