Date format in oracle system

Question

Hi expert,
date format in our oracle is 'mm/dd/yy', here in a application table, we got following fields:
ACCOUTING_FROM_DATE ACCOUTING_TO_DATE
1/28/13 1/01/00
could you please tell me what date is '1/01/00'?
and how to change oracle data format without affecting system ?
Many Thanks,

Answer 1

1001197 wrote:
Hi expert,
date format in our oracle is 'mm/dd/yy', here in a application table, we got following fields:
ACCOUTING_FROM_DATE ACCOUTING_TO_DATE
1/28/13 1/01/00
could you please tell me what date is '1/01/00'?No; that's one reason why 2-digit years are such a bad idea.
and how to change oracle data format without affecting system ?To change the default display format for all DATEs in your session:
ALTER SESSION  SET NLS_DATE_FORMAT = 'fmMM/fmDD/YYYY';This affects only your session; it will not affect other users in other sessions.
Regardless of what the default format is, you can display an individual DATE in a given format using TO_CHAR
SELECT     TO_CHAR ( accouting_to_date
          , 'fmMM/fmDD/YYYY'
          )          AS a_to
FROM    table_x
;