Show me the start station id for all trips.
select start_station_id from trip
How many of these occur at least 200 times?
select count ( distinct start_station_id ) from trip where start_station_id in ( select start_station_id from trip group by start_station_name having count ( * ) > = 200 )
Show me the ids and names of these stations.
select start_station_id, start_station_name from trip group by start_station_name having count ( * ) > = 200