Since I don't have sybase, I'll have to set up a test environment in SQLite instead.

I had figured you already had the data in memory, but I guess not. 

#!/usr/bin/perl

# http://perlmonks.org/?node_id=1171182

use strict;
use warnings;
use DBI;

my $dbfile = '/tmp/db.1171182';
unlink $dbfile;

my $db = DBI->connect_cached(
  "DBI:SQLite(RaiseError=>1,PrintError=>0):$dbfile");

$db->do('create table testing (one text, two text, color text)');

$db->begin_work;
while( <DATA> )
  {
  $db->do('insert into testing (one, two, color) values (?, ?, ?)',
    {}, split ' ');
  }
$db->commit;

my $sth = $db->prepare('select one, two, color from testing');
$sth->execute;

$_ = '';

while( my @row = $sth->fetchrow_array )
  {
  $_ .= "@row\n";
  }

1 while s/^(.*\n)((?:.*\n)*)\K\1//m;
1 while s/^(\S+ \S+ ).*\K\n((?:.*\n)*?)\1(.*\n)/:$3$2/m;

print;

__DATA__
A1 abc yellow
A1 abc yellow
B1 xyz green
A2 cde red
A1 abc green
A2 cde yellow
A1 abc blue

[download]

In reply to Re^3: join column 3 for unique values by Anonymous Monk
in thread join column 3 for unique values by hello_beginner

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