SQL> SELECT TO_TIMESTAMP_TZ('2005-05-13 07:15:31.1234 -7:00',
2 'YYYY-MM-DD HH24:MI:SS.FF TZH:TZM')
3 FROM dual;
TO_TIMESTAMP_TZ('2005-05-1307:15:31.1234-7:00','YYYY-MM-DDHH24:MI:SS.FFTZH:
---------------------------------------------------------------------------
13-MAY-05 07.15.31.123400000 AM -07:00
SQL>