Query Date Difference

Question

I have the data format in the customer contact table as DD/MM/YYYY
ex. 11/10/1981
how can i write SQL for calculate date difference from that date in table until now(SYSDATE) to know that
how long they be my customer ?
in format yy years mm month dd days
ex. 15 years 3 month 12 day
I have created this query....
SELECT customer_id, first_name ,cust_date,
TRUNC((TRUNC (sysdate)-cust_date)/365)| |' years '||
TRUNC(MOD(TRUNC(sysdate)-cust_date,365))||' days 'AS MDATE FROM Customer;
but it show only years and date...
ex. 31 years 165 days
how can i calculate for result "31 years X month Y day" ?

Answer 1

Here's a starting point...
SQL> select sysdate, sysdate - 1234 from dual
  2  /
SYSDATE   SYSDATE-1
09-AUG-06 24-MAR-03
SQL> select trunc(trunc(months_between (sysdate, sysdate - 1234))/12) yrs,
  2  mod(trunc(months_between(sysdate, sysdate - 1234)), 12) mnths,
  3  sysdate - add_months((sysdate - 1234), trunc(months_between(sysdate, sysdate - 1234))) dys
  4  from dual
  5  /
       YRS      MNTHS        DYS
         3          4         16
SQL> Edited by: BluShadow on Nov 24, 2008 3:51 PM
Darn it! way too slow. :D