如何创建JOB？？？

Question

Declare
    vJob Integer;
Begin
     Dbms_Job.Submit( :vJob,
                      'Pr_Get_Day_Account_Balance;',--漏掉了';'
                      To_Date( '29-10-2003 02:00:00', 'dd-mm-yyyy hh24:mi:ss'),
                      'Trunc( Sysdate + 1 ) + ( 1 / 12 )');
     Commit;
End;
/