"Of course, I can't post the actual specs or any (proprietary) data.Records without matching keys are to be written out as-is.For records with matching keys, combine them into a single output record:Exemption-Code is as described in my original post…"
"Sushree, thank you for your response. I have not just one, but several such fields (that must be compared among all records having the same key to determine the correct field value), so I take it this means I need to do two aggregations for each suc…"
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