The Job is the programmed execution of a task at a given time and during a given period of time. Once the schedule and the program objects have been defined, they can be used in a job definition making it simpler and more readable.

BEGIN
sys.dbms_scheduler.create_job(
job_name => '"OSCHEDULER"."OS_LOG_RECORDS_JOB"',
program_name => 'OSCHEDULER.OS_LOG_RECORD_PROG',
schedule_name => 'OSCHEDULER.MINUTELY_SCHEDULE',
job_class => 'DEFAULT_JOB_CLASS',
auto_drop => FALSE,
enabled => TRUE);
END;

A Job Class is a way of grouping jobs and linking them to a resource consumer group, so that you can define common properties among different jobs in a single operation. This enables the same behavior and same properties among homogeneous jobs. You can specify attributes at the class level; you can also define the order in which a job is started. Linking to resource manager is important as this is a way you can emphasize the resources allocated to all the jobs that...