-- Database schema
| city : City_ID [ INT ] primary_key , City [ TEXT ] , Hanzi [ TEXT ] , Hanyu_Pinyin [ TEXT ] , Regional_Population [ INT ] , GDP [ INT ] | match : Match_ID [ INT ] primary_key , Date [ TEXT ] , Venue [ TEXT ] , Score [ TEXT ] , Result [ TEXT ] , Competition [ TEXT ] | temperature : City_ID [ INT ] primary_key temperature.City_ID = city.City_ID , Jan [ INT ] , Feb [ INT ] , Mar [ INT ] , Apr [ INT ] , Jun [ INT ] , Jul [ INT ] , Aug [ INT ] , Sep [ INT ] , Oct [ INT ] , Nov [ INT ] , Dec [ INT ] | hosting_city : Year [ INT ] primary_key , Match_ID [ INT ] hosting_city.Match_ID = match.Match_ID , Host_City [ TEXT ] hosting_city.Host_City = city.City_ID |
-- -- Give me the temperature of Shanghai in January.

SELECT T2.Jan FROM city AS T1 JOIN temperature AS T2 ON T1.city_id = T2.city_id WHERE T1.city = "Shanghai";