How to make a function out of a query

Question

Hi,
I have the following query:
select
to_date(sysdate, 'DD.MM.YYYY') as "FULL_DATE",
to_number(to_char(sysdate, 'D')) as "DAY_OF_WEEK",
to_number(to_char(sysdate, 'DD')) as "DAY_NUMBER_IN CALENDAR_MONTH",
to_number(to_char(sysdate, 'DDD')) as "DAY_NUMBER_IN CALENDAR_YEAR"
from
dual
how to I make a funtion where I can input a start and an ending date and it calculates allt the rows fow the days in between?
Thanks,
Walter

Answer 1

drop type mytabletype;
create or replace type mytype as object (
full_date date,
dow number,
daynum_m number,
daynum_y number
create or replace type mytabletype as table of mytype;
create or replace function myfunc (p_date in date) return mytabletype pipelined as
  cursor cur_mycur is
  select
    to_date(p_date, 'DD.MM.YYYY') as "FULL_DATE",
    to_number(to_char(p_date, 'D')) as "DAY_OF_WEEK",
    to_number(to_char(p_date, 'DD')) as "DAY_NUMBER_IN_CALENDAR_MONTH",
    to_number(to_char(p_date, 'DDD')) as "DAY_NUMBER_IN_CALENDAR_YEAR"
    from dual;
  x mytype := mytype(null,null,null,null);
begin
  for i in cur_mycur
  loop
    x := mytype(i.full_date,i.day_of_week,i.day_number_in_calendar_month,i.day_number_in_calendar_year);
    pipe row(x);
  end loop;
end;
sho err
select * from table(myfunc(sysdate));
select * from table(myfunc(to_date('15/09/2006','dd/mm/yyyy')));is this what you're after.
If so I suggest you take it away, and get an understanding for it. It's a very useful technique to know.
I know it doesn't do all the days between 2 dates, but that should be something you can do with a little thought.
Regards
Message was edited by:
blushadow