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 have hosted events?
assistant
SELECT City FROM City AS T1 JOIN Hosting_City AS T2 ON T1.City_ID = T2.Host_City;
human
What is the average temperature in March of these cities?
assistant
SELECT AVG ( MAR ) FROM City AS T1 JOIN Hosting_City AS T2 ON T1.City_ID = T2.Host_City JOIN Temperature AS T3 ON T3.City_ID = T2.Host_City;
human
Among these cities, whose temperature in Mar is lower than that in July?
assistant
SELECT T1.city FROM city AS T1 JOIN temperature AS T2 ON T1.city_id = T2.city_id WHERE T2.Mar < T2.Jul INTERSECT SELECT T3.city FROM city AS T3 JOIN hosting_city AS T4 ON T3.city_id = T4.host_city ;