Originally posted by JMac

SQL > DECLARE
2 l_job NUMBER;
3 BEGIN
4 DBMS_JOB.SUBMIT(job=> l_job,
5 what=> 'say_hello;',
6 next_date => SYSDATE+(1/24/20) );
7* END;
SQL >/
PL/SQL procedure successfully completed.
Give commit

and check for last_date column of dba_jobs to check whether the job has run or not.