Yep. I couldn't tell if what was wanted was "unique in row", "unique in column" or "only singletons in column", so I just thought I'd toss something out there.

I do have a solution that takes practically no memory (uses external sort -u), but I'll wait to see responses to the proposed answers first.

In reply to Re^3: Get unique fields from file by tybalt89
in thread Get unique fields from file by sroux

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