JoÃ£o Victor Horto ทำรอบเร็วที่สุดได้กี่รอบ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many rounds did João Victor Horto achieved the fastest lap?It is not neccessary to use all the tables.
 table_25459168_2:  (round [ VARCHAR ] fastest_lap [ VARCHAR) ]
SELECT COUNT(round) FROM table_25459168_2 WHERE fastest_lap = "João Victor Horto"