模板O，照著寫，直接新增排程任務

begin

  dbms_scheduler.create_job(job_name            => 'xxxx',

                                job_type            => 'STORED_PROCEDURE',

                                job_action          => 'xxxx',

                                start_date          => to_date('04-08-2018 04:50:15', 'dd-mm-yyyy hh24:mi:ss'),

                                repeat_interval     => 'Freq=Daily;Interval=1;ByHour=4;ByMinute=50;',

                                end_date            => null,

                                job_class           => 'DEFAULT_JOB_CLASS',

                                enabled             => true,

                                auto_drop           => false,

                                comments            => 'xxxxxxx');

end;