since files could be much larger

Exactly, how large? The important thing here is to know if the data would fit into your computer RAM or not when expanded into Perl data structures.

That would tell you if you need to use an internal or an external sorting algorithm.

Update: BTW, use Text::CSV_XS instead of Text::CSV.

In reply to Re: Need to sort comma delimited, double quoted file by salva
in thread Need to sort comma delimited, double quoted file by CSharma

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