def _query_stations(city, limit=20):
    """Query to get the list of bicycle stations

    Parameters
    ----------
    city : str
    limit : int

    Returns
    -------
    str
    """
    return """SELECT id
      ,name
      ,address
      ,city
      ,nb_stations as nb_bikes
      ,st_x(geom) as x
      ,st_y(geom) as y
    FROM {schema}.{table}
    LIMIT {limit}
    """.format(schema=city,
               table='station',
               limit=limit)