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A classic example of this is the report programs described in the previous section. Structurally, these report programs look something like this:<< if running online >> 
        get report parameters and submit report job 
<< else >>
        produce required report using report parameters 
<< endif >>
 

     << if running online >> 
             get report parameters and submit report job 
     << else >>
             produce required report using report parameters 
     << endif >>

In the above case, obviously no database files whatsoever are required when the job is running online. Only when the job is running in batch and the report is being produced are the database files needed.

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