If you have access to Unix-type utilities:

join -t ',' file2 file1 >output

One note: you need to sort the files before passing them to join, if they aren't already.

Aaron B.
Available for small or large Perl jobs; see my home node.

In reply to Re: Merging Two CSV files Based on Two Columns by aaron_baugher
in thread Merging Two CSV files Based on Two Columns by TheCanadian

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