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On Fri, 25 Jan 2013 11:32:44 -0600, "Jerry C. Adams"
<midrange@xxxxxxxx> wrote:

The biggest advantage, though, was merging two input files into a new file
where the new file (usually a transaction file) had to be in a specific
order. Or the primary file might be a summary file (say, a customer
summary) that is being updated based upon a transaction file. There is an
MR indicator that is turned on if there is a match between the two files so
one could use MR to update the summary or NMR to create a new summary record
(new customer, you know).

I have some matching record programs to compare a new snapshot to an
old snapshot and send the changes (adds, changes, and deletes) to
another system.

Sure, I could roll my own comparisons in the C-specs, but matching
records handles it so nicely.

Ken
Opinions expressed are my own and do not necessarily represent the views
of my employer or anyone in their right mind.

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