I want to add (the field qty of all) the most recent records.

d_mov is the field that contains the date.

What I am trying to say is "sum field qty in table mv_li where the date has
the most recent value

select sum(a.qty) from mv_li a
where a.d_mov=(select first 1 b.d_mov from mv_li b
order by b.d_mov desc)

If I were Firebird, I would understand at once what to compute :)

What's wrong with FB ?

TIA

Duilio Foschi