SELECT a.sexo  FROM adtb00021 a
     WHERE a.num_emp = 752
;
     SELECT nom_dpto  FROM adtb00001
     WHERE departamento = 601
;
     SELECT nom_puesto  FROM adtb00004
     WHERE cod_puesto = 21

delete from adtb00021 where sexo is null
select *from adtb00003 where num_emp = 752