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 names of stadiums that the most swimmers have been to.
assistant
SELECT t3.name FROM record AS t1 JOIN event AS t2 ON t1.event_id = t2.id JOIN stadium AS t3 ON t3.id = t2.stadium_id GROUP BY t2.stadium_id ORDER BY count(*) DESC LIMIT 1
human
Find the names of stadiums whose capacity is smaller than the average capacity.
assistant
SELECT name FROM stadium WHERE capacity < (SELECT avg(capacity) FROM stadium)
human
Find the names of stadiums which have never had any event.
assistant
SELECT name FROM stadium WHERE id NOT IN (SELECT stadium_id FROM event)
human
Find the name of the stadium that has the maximum capacity.
assistant
SELECT name FROM stadium ORDER BY capacity DESC LIMIT 1
human
What is the name of the stadium which held the most events?
assistant
SELECT t1.name FROM stadium AS t1 JOIN event AS t2 ON t1.id = t2.stadium_id GROUP BY t2.stadium_id ORDER BY count(*) DESC LIMIT 1
human
Find the name and capacity of the stadium where the event named 'World Junior' happened.
assistant
SELECT t1.name , t1.capacity FROM stadium AS t1 JOIN event AS t2 ON t1.id = t2.stadium_id WHERE t2.name = "World Junior" ;