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Saturday, 12 March 2016

Capture Unmatched records from Join Stage - A Quick DataStage Recipe



How to capture unmatched records from "Join" Stage. This stage does not provide reject handling for unmatched records (such as in Inner Join)



Solution:

Use Outer Join operation. All rows on an outer link are output regardless of match on key values.


How to:

Add Outer join operation for "Join’ stage
When a match does not occur, Join stage inserts NULL values into unmatched columns
Filter stage can be used to test NULL values in unmatched columns




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