SELECT *
FROM Linea l
WHERE NOT EXISTS (SELECT *
                                  FROM Parada p
                                  WHERE NOT EXISTS (SELECT *
                                                                    FROM Abordaje a, Viaje v, Circuito c
                                                                    WHERE a.Id_Viaje = v.Id_Viaje AND
                                                                                a.Cod_Parada = p.Cod_Parada AND
                                                                                a.Tipo_Abor ='Trasbordo' AND
                                                                                l.Nro_Linea = v.Linea AND
                                                                                a.Cod_Parada = c.Cod_Parada AND
                                                                                c.Nro_Linea = l.Nro_Linea
                                                                   )
                                );