Order my select statement by fiscal year

Question

I want to order my select statement by
fiscal year of DATE_OF_SEPARATION,
inst_num,
trauma_num
The fiscal year is between YYYY/04/01 to YYYY+1/03/31
How would I write the order by statement
order by
inst_num,
trauma_num
Thanks
Brendon

Answer 1

either use your own calender in an auxiliary table
or write a function and order by function.
1. create table my_fiscal_year (day date, fiscal_year number);
select
    fiscal_year
  from
   ,my_fiscal_year
where
   date_of_separation = my_fiscal_year.day
order by
   my_fiscal_year.fiscal_year
2.
create function f_get_fiscal_year(p_date date) return number is
   l_year number ;
begin
   if to_char(p_date,'MM') between '01' and '03' then
     l_year := to_number(to_char(trunc(p_date,'YEAR'),'YYYY')) - 1;
   else
     l_year := to_number(to_char(trunc(p_date,'YEAR'),'YYYY')) ;
   end if ;
   return l_year ;
end ;
   order by
       f_get_fiscal_year (date_of_separation)