SQL> DECLARE
2 A TIMESTAMP WITH TIME ZONE;
3 B TIMESTAMP WITH TIME ZONE;
4 C TIMESTAMP WITH TIME ZONE;
5 BEGIN
6 C := TO_TIMESTAMP_TZ('2002-06-18 13:52:00.123456789 US/Eastern EDT','YYYY-MM-DD HH24:MI:SS.FF TZR TZD');
7 DBMS_OUTPUT.PUT_LINE(TO_CHAR(C,'YYYY-MM-DD HH:MI:SS.FF AM TZH:TZM TZR TZD'));
8 END;
9 /
PL/SQL procedure successfully completed.
SQL>