เสมอกัน 0-0 มีกี่เกม?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many number of games ended in a 0-0 tie?It is not neccessary to use all the tables.
 betfront:  year [ number]  datetime [ time]  country [ text]  competion [ text]  match [ text]  home_opening [ number]  draw_opening [ number]  away_opening [ number]  home_closing [ number]  draw_closing [ number]  away_closing [ number] 
SELECT COUNT(*) FROM football_data WHERE fthg = 0 AND ftag = 0