My code is:

```
SELECT 
    Sum(DR.TimeOfWork) "Skutečnost",
    SU.name "Jmeno"
FROM DevTimeRecords DR
left join SecurityUsers SU on SU.ID=DR.Worker_ID
left join DevBugs DB on DB.ID=DR.DevDocument_ID
left join DevProducts DPR on DPR.ID=DB.Product_ID
left join DevParts DPA on DPA.ID=DB.Part_ID
where
    SU.id = '@{_osoba}'
    and DPR.Code = 'ZP'
    and DPA.Code='A' 
    and not(DB.Status_ID IN ('TUPER00101','UUPER00101'))
group by
    SU.Name
order by
    SU.Name ASC

```

And I need to add column, in which will be count of workdays until today. For example: to today date this column return number 18 (27 days in month - weekends).
How can I add this column?