Código SQL [-] select * from direccion_operacional d left join (select codigo_suscriptor from facturacion f where Extract(Month From Fecha)='12') f on (d.codigo_do=f.codigo_suscriptor) where f.codigo_suscriptor is null;
select * from direccion_operacional d left join (select codigo_suscriptor from facturacion f where Extract(Month From Fecha)='12') f on (d.codigo_do=f.codigo_suscriptor) where f.codigo_suscriptor is null;