TO_TIMESTAMP_TZ(x,[format]) convert x to a TIMESTAMP WITH TIMEZONE with an optional format for x. : TO_TIMESTAMP_TZ « Date Timestamp Functions « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. Date Timestamp Functions
3. TO_TIMESTAMP_TZ

SQL>
SQL> SELECT TO_TIMESTAMP_TZ('2005-05-13 07:15:31.1234 PST',
  2   'YYYY-MM-DD HH24:MI:SS.FF TZR')
  3  FROM dual;

TO_TIMESTAMP_TZ('2005-05-1307:15:31.1234PST','YYYY-MM-DDHH24:MI:SS.FFTZR')
---------------------------------------------------------------------------
13-MAY-05 07.15.31.123400000 AM PST

SQL>