> when I set Ordering links (ASC and DESC) to some columns of the query,
> is it recommended to create both ASC and DESC indexes for those columns
> in the table or only ASC is sufficient?

I think it's recomended for search refinement

HTH

--
Best regards,
Aplication Developer
Pirtea Calin Iancu
S.C. SoftScape S.R.L.