human
Schema:
railway (Railway_ID, Railway, Builder, Built, Wheels, Location, ObjectNumber)
train (Train_ID, Train_Num, Name, From, Arrival, Railway_ID)
manager (Manager_ID, Name, Country, Working_year_starts, Age, Level)
railway_manage (Railway_ID, Manager_ID, From_Year)
Please answer with SQL.
assistant
Sure, I understand.
human
Can you list the names of the locations that have two or more railways?
assistant
SELECT LOCATION FROM railway GROUP BY LOCATION HAVING COUNT( * ) > = 2;
human
When were those built?
assistant
SELECT built FROM railway GROUP BY LOCATION HAVING COUNT( * ) > = 2;
human
What is the location of the most recently built railway?
assistant
SELECT LOCATION FROM railway ORDER by built desc LIMIT 1;
human
Who is the builder of the railway built earliest?
assistant
SELECT builder FROM railway ORDER by built asc LIMIT 1;
human
When was that railway built?
assistant
SELECT built FROM railway ORDER by built asc LIMIT 1 ;