#!/usr/bin/perl
use strict;
use warnings;
sub sortby_multiplecolumn {
my ($val1, $val2, $val3, $val4, $val5, $val6, $val7, $val8, $val9)
+ = split(" ",$a);
my ($val11, $val12, $val13, $val14, $val15, $val16, $val17, $val18
+, $val19) = split(" ",$b);
$val9 <=> $val19;
}
print $_ foreach (sort sortby_multiplecolumn <STDIN>);
You will get what you want. Here I used space as a delimiter. You can use tab as delimiter or use '\s'.
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