Add years to a given date

Question

I've two colunms in one of my tables: date & term
I want to calculate the end date now. but column date is of formate date and column term is of type int. How can I calculate the sum of these two?
If I have f.i. date = 02/11/2008 and term = 6. then I've to get 02/11/2014. How can I achieve this?
tnx in advance

Answer 1

If you are on the last day of the month, add_months function consider you want the nth month in same situation, e.g. the last day of the target month.
Whereas to_yminterval is more mathematical approach and get the same day as the source, that's one of the reason it might fail.
We could merge the two functions in a function :
SQL> create or replace function my_add_months(p_date date, p_months number) return date as
  2  begin
  3      return p_date+to_yminterval('00-'||p_months);
  4  exception when others then return add_months(p_date,p_months);
  5  end;
  6  /
Function created.
SQL>
SQL> select my_add_months(date '2008-02-29',10) , my_add_months(date '2008-02-29',72) from dual;
MY_ADD_MONTHS(D MY_ADD_MONTHS(D
29-DEC-08       28-FEB-14Nicolas.
Edited by: N. Gasparotto on Sep 3, 2008 10:32 AM