พื้นที่กว่า 100 เอเคอร์ในปี 2549 มีเหตุเพลิงไหม้กี่ครั้ง?ไม่จำเป็นที่จะต้องใช้โต๊ะทั้งหมด
How many fires were more than 100 acres in 2006?It is not neccessary to use all the tables.
 fires:  fire_year [ number]  discovery_date [ number]  discovery_doy [ number]  discovery_time [ text]  stat_cause_code [ number]  stat_cause_descr [ text]  cont_date [ text]  cont_doy [ text]  cont_time [ text]  fire_size [ number]  fire_size_class [ text]  latitude [ number]  longitude [ number]  owner_code [ number]  owner_descr [ text]  state [ text]  county [ text]  fips_code [ text]  fips_name [ text] 
SELECT COUNT(*) FROM fires WHERE fire_year = 2006 AND fire_size > 100