Regarding working hours of a month

Question

Hi All,
I have 3 page items (2 are date picker item & 3rd is text box item).
Now when user insert date into 1st datepicker item as "06/16/2009" and into 2nd datepicker item as "07/15/2009", than into 3rd page item(which is text box) should automatically caluated as <b>22</b>. As 22 are the actual working days btw "06/16/2009 and 07/15/2009" excluding weekends.
I did by calcuated into SQL Server 2005 Mgmt Studio something like this:-
declare @fromdate datetime
declare @todate datetime
declare @day int
declare @count int
set @fromdate = '06/16/2009'
set @todate = '07/15/2009'
set @day = 0
set @count = 0
while ( @fromdate <= @todate )
     begin
          set @day = (select datepart(weekday, @fromdate))
          if (@day >=2 and @day <= 6)
          begin
               set @count = @count + 1
          end
          set @fromdate = @fromdate + 1
     end
SELECT @count
and the output was <b>22</b> which was same as my req.
Now my question is in what way I should go ahead into APEX such that 22 number is caluated by form itself, do I need to write pl/sql process or using JS?
Which will be best and professional way?
If any other way than plz do let me know.
Thanks
I appreciate your replies n suggestion.
regards,
Kumar

Answer 1

SQL>CREATE OR REPLACE function WORKING_DAYS(
s in date := to_date('06/16/2009','mm/dd/yyyy'),
e in date := to_date('07/15/2009','mm/dd/yyyy')
return number
is
     t_hr number := 0;
        t_incr number := 0;
        t_cnt number := 0;
begin
     loop
                select decode(rtrim(to_char(s + t_cnt,'DAY')),'SATURDAY',0,'SUNDAY',0,1) into t_incr from dual;
             t_hr := t_hr + t_incr;
                t_cnt := t_cnt + 1;
            exit when t_cnt + trunc(s) = trunc(e) + 1;
     end loop;
return t_hr;
end;
select WORKING_DAYS() from dual;
WORKING_DAYS()
         22