human
Schema:
swimmer (ID, name, Nationality, meter_100, meter_200, meter_300, meter_400, meter_500, meter_600, meter_700, Time)
stadium (ID, name, Capacity, City, Country, Opening_year)
event (ID, Name, Stadium_ID, Year)
record (ID, Result, Swimmer_ID, Event_ID)
Please answer with SQL.
assistant
Sure, I understand.
human
Find the country that has the most stadiums.
assistant
SELECT country FROM stadium GROUP BY country ORDER BY count(*) DESC LIMIT 1
human
Which countries do not have a stadium that was opened after 2006?
assistant
SELECT country FROM stadium EXCEPT SELECT country FROM stadium WHERE opening_year > 2006
human
Which country has at most 3 stadiums listed?
assistant
SELECT country FROM stadium GROUP BY country HAVING count(*) <= 3
human
How many stadiums are there?
assistant
SELECT count(*) FROM stadium
human
How many stadiums does each country have?
assistant
SELECT country , count(*) FROM stadium GROUP BY country
human
How many stadiums are not in country 'Russia'?
assistant
SELECT COUNT( * ) FROM stadium WHERE country != "Russia" ;