Използване на SELECT UNION и връщане на изход от две колони от една таблица

Друг начин (без CASE израз):

SELECT 
  ( SELECT COUNT(*)
    FROM tblActor 
    WHERE ActorGender = 'm' 
  ) AS MaleActors
, ( SELECT COUNT(*)
    FROM tblActor 
    WHERE ActorGender = 'f' 
  ) AS FemaleActors
FROM 
    dual ;

и повече решения с CROSS присъединете се:

SELECT m.MaleActors, f.FemaleActors
FROM 
  ( SELECT COUNT(*) AS MaleActors
    FROM tblActor 
    WHERE ActorGender = 'm' 
  ) m
  CROSS JOIN
  ( SELECT COUNT(*) AS FemaleActors
    FROM tblActor 
    WHERE ActorGender = 'f' 
  ) f  ;