Using Sort::Key::Multi module: 
use Sort::Key::Multi qw(s3_keysort); # s3 => three string keys

my @data = <DATA>;
my @sorted = s3_keysort { (split)[0,1,4] } @data;
print for @sorted;

__DATA__
D1001     SNAM1        1     101      XYZ1234      21.11
D1001     SNAM1        1     102      XYZ2234      22.12
D1002     SNAM2        1     201      PQR2234      12.12
D1002     SNAM2        2     202      PQR2234      32.12
D1002     SNAM2        3     203      PQR2234      52.12
D1002     SNAM2        4     204      PQR2234      37.12
D1001     SNAM1        2     103      XYZ1234      22.12
D1003     SNAM3        1     301      ABC1234      22.12
D1002     SNAM2        5     205      PQR2234      37.12
D1001     SNAM1        4     104      XYZ1234      22.12

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In reply to Re: Sample Sort Code by salva
in thread Sample Sort Code by Anonymous Monk

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