SELECT city ,  COUNT(*) FROM station GROUP BY city HAVING COUNT(*)  >=  15
List the name and the number of stations for all the cities that have at least 15 stations.
SELECT city , COUNT ( * ) FROM station GROUP BY city HAVING COUNT ( * ) > = 15
select city , count ( * ) from station group by city having count ( * ) > = value
List the name and the number of stations for all the cities that have at least 15 stations .