Doubt using to_timestamp

I have a table A with Timestamp data type.
DATE1 TIMESTAMP
SELECT DATE1 FROM A
02-AUG-12 01.45.02.222000000 PM
02-AUG-12 01.45.02.222000000 PM
02-AUG-12 10.45.02.222000000 AM
02-AUG-12 01.45.02.222000000 PM
I want to add 1 year to this date and on the result I want to see the fraction as well.
But when I add 365 I am loosing the time and fraction part even after converting to TO_TIMESTAMP.
SELECT DATE1, DATE1 +365, to_timestamp(DATE1 +365,'yyyy-mm-dd hh:mi:ss.ff') FROM A
02-AUG-12 01.45.02.222000000 PM     02-AUG-13     13-AUG-02 12.00.00.000000000 AM
02-AUG-12 01.45.02.222000000 PM     02-AUG-13     13-AUG-02 12.00.00.000000000 AM
02-AUG-12 10.45.02.222000000 AM     02-AUG-13     13-AUG-02 12.00.00.000000000 AM
02-AUG-12 01.45.02.222000000 PM     02-AUG-13     13-AUG-02 12.00.00.000000000 AM
Is there a way I can add 1 year to date and yet see the fraction part of the date?
Thanks

user625850 wrote:
Thanks for quick response. I am able to get the time and added an year too. NUMTOYMINTERVAL.Well, not exactly. Adding interval adds it literally. Adding interval '1' year simply bumps up year by 1. Therefore, if your date is February 29, adding interval '1' year will fail:
SQL> select to_timestamp('29-FEB-12 01.45.02.222000000 PM','dd-mon-rr hh.mi.ss.ff9 pm') + interval '1' year from dual
2 /
select to_timestamp('29-FEB-12 01.45.02.222000000 PM','dd-mon-rr hh.mi.ss.ff9 pm') + interval '1' year from dual
ERROR at line 1:
ORA-01839: date not valid for month specified
SQL> I gave you solution to add 365 days. If you want to add 1 year:
with sample_table as (
                      select to_timestamp('02-AUG-12 01.45.02.222000000 PM','dd-mon-rr hh.mi.ss.ff9 pm') date1 from dual union all
                      select to_timestamp('02-AUG-12 01.45.02.222000000 PM','dd-mon-rr hh.mi.ss.ff9 pm') from dual union all
                      select to_timestamp('02-AUG-12 10.45.02.222000000 AM','dd-mon-rr hh.mi.ss.ff9 pm') from dual union all
                      select to_timestamp('02-AUG-12 01.45.02.222000000 PM','dd-mon-rr hh.mi.ss.ff9 pm') from dual union all
                      select to_timestamp('29-FEB-12 01.45.02.222000000 PM','dd-mon-rr hh.mi.ss.ff9 pm') from dual
select date1,
        case to_char(date1,'mmdd')
          when '0229' then date1 - interval '1' day
          else date1
        end + interval '1' year date1_plus_1_year
from sample_table
DATE1                               DATE1_PLUS_1_YEAR
02-AUG-12 01.45.02.222000000 PM     02-AUG-13 01.45.02.222000000 PM
02-AUG-12 01.45.02.222000000 PM     02-AUG-13 01.45.02.222000000 PM
02-AUG-12 10.45.02.222000000 AM     02-AUG-13 10.45.02.222000000 AM
02-AUG-12 01.45.02.222000000 PM     02-AUG-13 01.45.02.222000000 PM
29-FEB-12 01.45.02.222000000 PM     28-FEB-13 01.45.02.222000000 PM
SQL> As you can see, February 29 of leap year is converted to February 28 of next year.
SY.

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