I´m trying a query in oracle 10g. It goes like this:
SELECT * FROM h2h_reg reg, h2h_cat_estatus est WHERE r
Try with DISTINCT :
DISTINCT
SELECT DISTINCT reg.id_arch, reg.id_prod FROM h2h_reg reg, h2h_cat_estatus est WHERE reg.FECH_APLICACION = SYSDATE AND reg.id_est = est.id_estatus AND est.tipo_estatus = 'X'