ITRemote

Timezone Change

Last DDL date

World Default Date

Timestamp in insert statement

careful setting timezone

To change the Oracle timezone

Answer:  First, see my notes on Oracle timezone. To see your local time zone, enter:

select
   sessiontimezone
from
   dual;

The time_zone is normally set at database creation time:

create database . . .     set time_zone='+00:00';

To change the Oracle timezone for an existing Oracle database, change the time_zone parameter and then bounce the database.

alter database set time_zone = '-05:00'; 
shutdown immediate
startup

For OMS, log into the OMS repository as the SYSMAN user, the above command 'emctl resetTZ agent' tells you exactly what needs to be executed in the repository.

SQL> exec mgmt_target.set_agent_tzrgn('', 'Etc/GMT-6');
SQL> commit;
SQL> emctl start agent -- (or emctl start dbconsole)

Reference:

MOSC: Timestamps & time zones - Frequently Asked Questions Doc ID: Note:340512.1