ขออุณหภูมิเซี่ยงไฮ้เดือนมกราคมหน่อยค่ะ ไม่จำเป็นต้องใช้ทุกโต๊ะ
Give me the temperature of Shanghai in January.It is not neccessary to use all the tables.
 hosting_city:  year [ number]  match_id [ number]  host_city [ text] 
SELECT T2.jan FROM city AS T1 JOIN temperature AS T2 ON T1.city_id = T2.city_id WHERE T1.city = "Shanghai"