How to fetch the data records in summary format based on previous day

Question

drop table T1;
create table T1(Class, Fees_Collected, Submit_Date) as select
'MBA', 100000, '7/30/2012' from dual union all select
'Btech', 20000, '7/10/2012' from DUAL union all select
'MBA', 45000, '8/1/2012' from dual union all select
'Btech', 55550, '7/31/2012' from DUAL union all select
'BBA', 250660, '7/30/2012' from dual union all select
'MBBS', 44556000, '7/31/2012' from DUAL union all select
'BDS', 420050, '8/1/2012' from DUAL union all select
'BBA', 30450, '7/30/2012' from DUAL union all select
'MBBS', 120450, '7/31/2012' from DUAL union all select
'BDS', 45950, '7/30/2012' from DUAL union all select
'MBA', 252450, '8/1/2012' from DUAL;My requirment is to fetch the records based on summary format to display the data with following columns -
Class |Prev Day Traded Value |Prev Day % of Total |Prev Day % MBA
Note - Previous Day definiton (Buisness Day) = calendar days - (weekends + US Holidays)
Kindly help me, as i want to keep it customized so that without specifying the hard coded dates ( Previous Day) it runs through and provide me the resultset....
All of your help and time is highly appericated.

Answer 1

You mean business days I guess ?
I use a function (I had to write it myself) <tt><b> next_business_day(p_start_date in date,p_days_count in number) return date </b></tt>
where I loop forward/backward from p_start_date according to the sign of p_days_count the required number of steps skipping weekends and holidays as the absolute value of p_days_count is mostly under 30 for the rest (at least around here) Oracle's <tt><b> add_months </b></tt> gets it done.
Regards
Etbin
Edited by: Etbin on 6.8.2012 17:55
Year till date: <tt><b> your_date between trunc(sysdate,'year') and sysdate </b></tt> is it ? http://en.wikipedia.org/wiki/Year-to-date ?
Edited by: Etbin on 6.8.2012 18:27
NOT TESTED!
function next_business_date(p_start_date in date,p_count_days in number) return date is
  steps  number := abs(p_count_days);
  retval date := p_start_date;
begin
  if p_start_date is null or p_count_days is null then
    return to_date(null);
  end if;
  while steps > 0
  loop
/* skipping weekends and (yet to be implemented) holidays */
    while to_char(retval,'dy') in ('sat','sun') /* or is_holiday(retval) */
    loop
      retval = retval + sign(p_count_days);
    end loop;
/* retval contains a business day now */
    retval = retval + sign(p_count_days);
    step := step - 1;
  end_loop
  return retval;
end;