How to get the number of years, months with two sysdate()

Hi All,
Sorry for posted another question regarding the conversion.
I have the hiring day and current day in date format like : '2005-10-01' and '2006-09-14'
How to get the differences between current date is ('2006-09-01') and
hiring date is ('2004-10-01' )
in the format number of years and number of month without using the Mod
function . For this example the result is : 2 years 1 month
Thanks
JP

How to get the differences between current date is ('2006-09-01') and
hiring date is ('2004-10-01' )
in the format number of years and number of month without using the Mod
function . For this example the result is : 2 years 1 monthshould not it be 1 year 11 months???
SQL> select (date '2006-09-01' - date '2004-10-01') year to month diff from dual;
DIFF
+01-11

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