BEGIN 
  DBMS_SCHEDULER.CREATE_CREDENTIAL ( 
    credential_name => 'CREDENCIAL_PRUEBA', 
    username => 'TONYROJAS', 
    password => 'ABC', 
    windows_domain => 'SYSTEM' 
  ); 
END; 
 
BEGIN 
  DBMS_SCHEDULER.create_job ( 
    job_name        => 'PRUEBA', 
    job_type        => 'EXECUTABLE', 
    job_action      => 'C:\WINDOWS\SYSTEM32\CMD.EXE', 
    number_of_arguments => 2, 
    start_date      => SYSTIMESTAMP, 
    repeat_interval => 'FREQ=DAILY; BYHOUR=23', 
    enabled         => FALSE, 
    auto_drop       => FALSE, 
    comments        => 'Job para realizar backup diario' 
  ); 
  -- EJECUTAR COMANDOS DENTRO DEL SIMBOLO DEL SISTEMA 
    DBMS_SCHEDULER.set_job_argument_value ('PRUEBA', 1, '/C'); 
    DBMS_SCHEDULER.set_job_argument_value ('PRUEBA', 2, 'C:\BackupOracle\creararchivo.cmd'); 
  **  DBMS_SCHEDULER.set_attribute('PRUEBA', 'credential_name', 'CREDENCIAL_PRUEBA');** 
    DBMS_SCHEDULER.enable('PRUEBA'); ` 
END; 
 
BEGIN DBMS_SCHEDULER.run_job('PRUEBA'); END;