human
Schema:
roller_coaster (Roller_Coaster_ID, Name, Park, Country_ID, Length, Height, Speed, Opened, Status)
country (Country_ID, Name, Population, Area, Languages)
Please answer with SQL.
assistant
Sure, I understand.
human
Hi! How are you? Can you show me a list of all of the country names?
assistant
SELECT Name FROM country;
human
Great! Can you update this list to include the average roller coaster speed for each of these three countries?
assistant
SELECT T1.Name , AVG ( T2.Speed ) FROM country AS T1 JOIN roller_coaster AS T2 ON T1.Country_ID = T2.Country_ID GROUP BY T1.Name;
human
Thank you for that! Would you be able to show me the roller coaster names associated with just Sweden?
assistant
SELECT T2.Name FROM country AS T1 JOIN roller_coaster AS T2 ON T1.Country_ID = T2.Country_ID WHERE T1.Name = "Sweden" ;