If you only want to print the sorted rows into another file, then IMHO it is easier to read the file into an array of arrays and sort them then. 

use strict;
use warnings;

my $header = <DATA>;
my @rows = 
    map { join "\t", @$_ }
    sort { $a->[1] cmp $b->[1] ||
           $a->[2] cmp $b->[2] ||
           $a->[3] cmp $b->[3] ||
           $a->[4] <=> $b->[4] 
         }
    map {[ split /\s+/ ]} <DATA>;
print $header;
print "$_\n" for @rows;

__DATA__
pin Name      related_pin  time_type    rise_fall             delay
DQ5_RX_CLK     M2CLKP     c_rise     rise_transition     0.014446
DQ2_RX_CLK     M2CLKP     c_rise     rise_transition     0.014464
DQ0_RX_CLK     M2CLKP     c_rise     rise_transition     0.014452
DQ3_RX_CLK     M2CLKP     c_rise     rise_transition     0.014452
DQ7_RX_CLK     M2CLKP     c_rise     rise_transition     0.014430
DQ4_RX_CLK     M2CLKP     c_rise     rise_transition     0.014446
DQ8_RX_CLK     INT_CLK  c_fall  fall_transition     0.199360
DQ6_RX_CLK     INT_CLK  c_fall  fall_transition     0.199322
DQ1_RX_CLK     INT_CLK  c_fall  fall_transition     0.199500
DQ5_RX_CLK     INT_CLK  c_fall  fall_transition     0.199248
DQ2_RX_CLK     INT_CLK  c_fall  fall_transition     0.199368

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In reply to Re: Sorting Multilevel Hashes by hdb
in thread Sorting Multilevel Hashes by newCoder

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