text: SELECT
      c.country_name,
      MAX(p.elevation) AS highest_peak_elevation,
      MAX(r.length) AS lelongest_river_length
  FROM
      countries AS c
          JOIN
      mountains_countries AS mc ON c.country_code = mc.country_code
          JOIN
      mountains AS m ON mc.mountain_id = m.id
          JOIN
      peaks AS p ON m.id = p.mountain_id
          JOIN
      countries_rivers AS cr ON c.country_code = cr.country_code
          JOIN
      rivers AS r ON cr.river_id = r.id
  GROUP BY c.country_name
  ORDER BY highest_peak_elevation DESC , lelongest_river_length DESC , c.country_name
  LIMIT 5;