https://community.hpe.com/t5/operating-system-hp-ux/join-command-in-perl/m-p/3323039#M187712 you can use two hashes and use the `key' fields as hash key (maybe packed - see perldoc -f pack), and compare the values for each key that occurs in both hashes<BR /><BR />Have a look at CPAN modules Text::CSV_XS and Text::Diff<BR /><BR />Enjoy, Have FUN! H.Merijn Mon, 05 Jul 2004 09:01:09 GMT H.Merijn Brand (procura 2004-07-05T09:01:09Z https://community.hpe.com/t5/operating-system-hp-ux/join-command-in-perl/m-p/3323038#M187711 Hi all,<BR /><BR />Basically, what I'm trying to do is compare two large CSV files and find out which fields have changed since the last update. Based on that, I want to produce comparison files based on which field was different.<BR /><BR />I know of a way to do this using the 'join' command in HP-UX (please see <A href="http://www.opengroup.org/onlinepubs/009695399/utilities/join.html" target="_blank">http://www.opengroup.org/onlinepubs/009695399/utilities/join.html</A> for details), but I would like to do this in Perl.<BR /><BR />Would appreciate any help!<BR /><BR />Cheers,<BR />Ben Mon, 05 Jul 2004 08:56:33 GMT https://community.hpe.com/t5/operating-system-hp-ux/join-command-in-perl/m-p/3323038#M187711 Benjamin Cheong 2004-07-05T08:56:33Z https://community.hpe.com/t5/operating-system-hp-ux/join-command-in-perl/m-p/3323039#M187712 you can use two hashes and use the `key' fields as hash key (maybe packed - see perldoc -f pack), and compare the values for each key that occurs in both hashes<BR /><BR />Have a look at CPAN modules Text::CSV_XS and Text::Diff<BR /><BR />Enjoy, Have FUN! H.Merijn Mon, 05 Jul 2004 09:01:09 GMT https://community.hpe.com/t5/operating-system-hp-ux/join-command-in-perl/m-p/3323039#M187712 H.Merijn Brand (procura 2004-07-05T09:01:09Z