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  Oracle Tips by Burleson

Oracle Job Scheduling

Chapter 3 - Time-Based Job Scheduling

Complex Date Rules for Job Execution

The same result could be achieved by running a different schedule in each environment, but it serves to illustrate the point.

It should now be obvious that there is an almost limitless combination of possible calendar string and PL/SQL expression variations.  The only way to become really confident with repeat intervals is to try as many variations as possible.  The test procedures presented in this chapter will allow this to be done without having to actually schedule jobs, which in turn will save lots of time.


In this chapter, a number of areas both directly and indirectly related to repeat intervals of scheduled jobs have been covered.  The topics include:

  • The use of the DATE datatype, including modification of dates using literals and date functions.

  • The use of the TIMESTAMP datatype, including the use of timestamp functions.

  • The use of the INTERVAL datatype, the interval literal syntax and interval functions.

  • The calendar syntax in Oracle10g.

  • Complex date rules for job execution in jobs scheduled using the dbms_job and dbms_scheduler packages.

The next chapter will investigate a number of techniques that can be implemented to make job scheduling more robust.

The above text is an excerpt from:

Oracle Job Scheduling
Creating Robust Task Management with dbms_job and Oracle10g dbms_scheduler

ISBN 0-9744486-6-4

by Dr. Timothy S. Hall

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