Or the module Data::Table. If the CSV file is similar to the one jeffa used earlier:

        lastname,firstname,num1,num2,num3
        Smith,Joe,40,76,175
        Page,Betty,60,58,165
        Nader,Ralph,55,63,190
        Alexander,Sue,25,54,98
        Saxon,Jackson,32,60,155
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Then you can use this code to generate a Data::Table object. This example prints it out as an HTML table, but there are other options...

use Data::Table;

# Create a table object from a CSV file
my $table = Data::Table::fromCSV("data.txt");

# Sort by last name, then by first name
$table->sort('lastname', 0, 0, 'firstname', 0, 0);

# Print it as an HTML table, for example
print $table->html;
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buckaduck