Nls_date_format in oracle 10g XE

Question

Hi guys,
I've been trying to change the default date format in my instance of 10g XE. I could do it in Standard version just modifying the init script but I couldn't find a way to do it in XE.
I don't want to use "ALTER SESSION" since I really need to change the default date format and not just in the sesion.
Could you help me?
Cheers.

Answer 1

You could create an after logon trigger as in following example :
SQL> sho user
USER is "SYS"
SQL> select sysdate from dual;
SYSDATE
24-MAY-07
SQL> create or replace trigger after_logon
  2  after logon on database
  3  begin
  4     if user='TEST' then
  5             execute immediate
  6             'alter session set nls_date_format=''YYYY-mm-dd hh24:mi:ss''';
  7     end if;
  8  end;
  9  /
Trigger created.
SQL> conn test/test
Connected.
SQL> select sysdate from dual;
SYSDATE
2007-05-24 15:56:55
SQL> conn system/manager
Connected.
SQL> /
SYSDATE
24-MAY-07
SQL>