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Oracle Job Scheduling

Chapter 4 - Chaining Oracle Jobs Together

This chapter will introduce a number of techniques that can be used to create dependencies between jobs and make job executions more robust. An explanation of how a job chain is created is a good place to start.

Creating a Job Chain

Jobs are often defined as individual tasks that are performed in isolation; however, in some circumstances, a job consists of several tasks that must be performed as a whole in a specific sequence.  Typically, this would be accomplished by combining the tasks into a single job like the one defined below.

DBMS_SCHEDULER.create_job (
  job_name        => 'single_job',
  job_type        => 'PLSQL_BLOCK',
  job_action      => ‘BEGIN
  start_date      => SYSTIMESTAMP,
  repeat_interval => ‘freq=daily; byhour=9; byminute=0; bysecond=0;’,
  end_date        => NULL,
  enabled         => TRUE,
  comments        => 'Single job.');

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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