Hello deadlift

You were on the right road to consider using a hash.

Here is a possible solution using a hash (for the first shorter file).

#!/usr/bin/perl
use strict;
use warnings;

my $File1 = <<EOF;
Name, Job, City, State
Jim, MD, Pinole, CA
Tara, Nurse, San Pablo, CA
Julie, MD, San Pablo, CA
Sherry, Nurse, Pinole, CA
George, MD, Pinole, CA
Tim, Nurse, Pinole, CA
Bob, Nurse, Pinole, CA
Uma, MD, San Pablo, CA
Kate, Nurse, Oakland, CA
Pete, MD, San Pablo, CA
EOF

my $File2 = <<EOF;
Name, Job, City, State
Jim, Doctor, Pinole, CA
Tara, Nurse, San Pablo, CA
Julie, Doctor, San Pablo, CA
Sherry, Nurse, Pinole, CA
Jan, Doctor, San Pablo, CA
George, Doctor, Pinole, CA
Tim, Nurse, Richmond, CA
Bob, Nurse, Pinole, CA
Uma, Doctor, San Pablo, CA
Kate, Nurse, Oakland, CA
Paul, Doctor, Oakland, CA
Ruth, Nurse, Richmond, CA
Joe, Nurse, Oakland, CA
Nick, Nurse, Pinole, CA
Pete, Doctor, San Pablo, CA
EOF

my %occupation;

open my $fh1, '<', \$File1 or die $!;

<$fh1>; # throw away header line

while (<$fh1>) {
    my ($name, $title) = split /, /;
    $occupation{$name} = $title;    
}
close $fh1 or die $!;

open my $fh2, '<', \$File2 or die $!;

<$fh2>; # throw away header line

while (<$fh2>) {
    my ($name, $title) = split /, /;
    
    if (exists $occupation{$name} and $occupation{$name} ne $title) {
        print $name, " => Prev: $occupation{$name}, Now: $title\n";   
+ 
    }
}
close $fh2 or die $!;
[download]

You can see that I used strict and warnings which you should use (to identify errors or warnings in code).

That requires declaring the variables with my.

Also, it is good practice to check whether a file opening (or closing) occurred without error (the or die $! code on file openings and closings).

Although I didn't use Text::CSV here, it really should be used for more complex csv files.

Output:

C:\Old_Data\perlp>perl test2.pl
Jim => Prev.: MD, now: Doctor
Julie => Prev.: MD, now: Doctor
George => Prev.: MD, now: Doctor
Uma => Prev.: MD, now: Doctor
Pete => Prev.: MD, now: Doctor
[download]

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