Setahu saya, perintah ALTER ... tidak bisa dijalankan di dalam 
PL/SQL Block, termasuk di dalam trigger.

Alternatif-nya, anda bisa menggunakan package DBMS_SESSION

Bowo


--- In [email protected], "Firman H.M." <[EMAIL PROTECTED]> 
wrote:
>
> create or replace trigger
>    different_date
> AFTER LOGON ON DATABASE
> BEGIN
> if user='A' then
>    alter session set nls_date_format = 'dd-mm-yyyy';
> else
>    alter session set nls_date_format = 'yyyy-mm-dd';
> end if;
> END;
> /
> 
> CMIIW
> 
> 2007/1/25, Oscar Wilyanto <[EMAIL PROTECTED]>:
> >
> >   Dear Masters,
> >
> > Mau tanya, apakah di Oracle tipe data 'date' bisa di pre-set 
formatnya?
> >
> > jadi misalnya di database A format tanggalnya 25-12-2006, 
sedangkan di
> > database B format tanggalnya bisa 2006-12-25.
> >
> > Kalau ya, bagaimana cara men-setnya?
> >
> > Thanks,
> > Oscar
> >
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