human
Schema:
city (City_ID, City, Hanzi, Hanyu_Pinyin, Regional_Population, GDP)
match (Match_ID, Date, Venue, Score, Result, Competition)
temperature (City_ID, Jan, Feb, Mar, Apr, Jun, Jul, Aug, Sep, Oct, Nov, Dec)
hosting_city (Year, Match_ID, Host_City)
Please answer with SQL.
assistant
Sure, I understand.
human
Which cities are host cities?
assistant
SELECT T1.city FROM city AS T1 JOIN hosting_city AS T4 ON T1.city_id = T4.host_city;
human
Okay, which cities have not hosted?
assistant
SELECT city FROM city WHERE City_ID NOT IN ( SELECT Host_City FROM hosting_city );
human
Great! Out of those cities, which ones have temperatures lower in March compared to their December temperature?
assistant
SELECT T1.city FROM city AS T1 JOIN temperature AS T2 ON T1.city_id = T2.city_id WHERE T2.Mar < T2.Dec EXCEPT SELECT T3.city FROM city AS T3 JOIN hosting_city AS T4 ON T3.city_id = T4.host_city ;