Although dbms_job still exists in 10gand 11g, Oracle recommends the use of dbms_scheduler in releases 10g and up. Nonew features are being added to dbms_job and you will likely quickly run intoits limitations.

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dbms_scheduler is more robust andfully-featured than dbms_job and includes the following features that dbms_job doesnot have :

dbms_scheduler功能比dbms_jobs更加健全，推薦使用dbms_scheduler；以下比較來自google，并不代表全部觀點。

·        logging of job runs (job history)

·        simple but powerful scheduling syntax (similar to butmore powerful than cron syntax)

·        running of jobs outside of the database on the operatingsystem

·        resource management between different classes of jobs

·        use of job arguments including passing of objects intostored procedures

·        privilege-based security model for jobs

·        naming of jobs and comments in jobs

·        stored, reusable schedules

Features in releases after 10g Release 1include :

·        dependencies between job units (10gR2 and up)

·        scheduling based on financial calendars and fiscalquarters (10gR2 and up)

·        event based jobs which run when an event is received (10gR2and up)

·        running of jobs on remote machines (11gR1 and up)

·        e-mail notifications on job events of interest (10gR2 andup)

·        starting a job based on arrival of a file (10gR2 and up)