[droguerman]

Código SQL [-]
Select H.ID_ARTICULO,  H.NUMERO
, (Select SUM(H1.CANTIDAD) From FVHISARTI H1
   where H1.ID_ARTICULO = H.ID_ARTICULO and ISNULL(H1.NUMERO,0) = ISNULL(H.NUMERO,0) and H1.clave = '51') as Ventas
from FVHISARTI H
WHERE H.ID_ARTICULO = 100
group by H.ID_ARTICULO, H.NUMERO