oracle新建job

declare
job number;

begin
  sys.dbms_job.submit(job => job,
                      what => 'dx_lrbf;',
                      next_date => to_date('04-04-2013 07:20:00', 'dd-mm-yyyy hh24:mi:ss'),
                      interval => 'trunc(sysdate)+1+7/24+20/(24*60)');
  commit;
end;
/