adding primary keys to a newly created table

Hi everyone
We are on V7r3
We are creating number of extracts to transfer over to another system
The extracts are created in the following manner (This is just a simple example)

CREATE OR REPLACE TABLE LIBRARY/OUTFILE AS
(SELECT SOURCE,ORDNO,CUSNO,PART,SPEC,ORQTY,DUEDT
FROM INFILE
WHERE SOURCE = '04')
WITH DATA
ON REPLACE DELETE ROWS

We have now been asked to ensure certain fields within these tables are unique
For example, in the above SOURCE and ORDNO
I was looking into PRIMARY KEYS for this
Here are my questions that I am trying to google search on
Is there a way of including the primary keys as part of the above create?
What happens if a duplicate key is found? - will the process stop, or is there a way to code this so that duplicates are bypassed - but I can be informed that duplicates exist?

My Google search has not yet come up with anything definitive that answers the above questions, but my search continues

Alan Shore
Solutions Architect
IT Supply Chain Execution

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