รหัสของเมืองที่จัดกิจกรรมในปีที่ผ่านมาคืออะไร? ไม่จำเป็นต้องใช้ตารางทั้งหมด
What is id of the city that hosted events in the most recent year?It is not neccessary to use all the tables.
 temperature:  city_id [ number]  jan [ number]  feb [ number]  mar [ number]  apr [ number]  jun [ number]  jul [ number]  aug [ number]  sep [ number]  oct [ number]  nov [ number]  dec [ number] 
SELECT host_city FROM hosting_city ORDER BY year DESC LIMIT 1