my $links_db = $DB->table ('Links', 'CatLinks', 'Category');
my $cond = GT::SQL::Condition->new( 'isValidated' => '=' => 'Yes', 'something' => '=' => '5' );

$links_db->select_options ("GROUP BY Links.ID ORDER BY Mod_Date DESC", "LIMIT 30");

my $sth2 = $links_db->select( ['Links.ID','Title','URL'] => $cond ) || die $GT::SQL::error;

while (my $hit = $sth->fetchrow_hashref) {
# you now have access to $hit->{ID}, $hit->{Title} and $hit->{URL}
do_stuff($hit);

# $hit will now have the values, including what was editing in do_stuff()
}

sub do_stuff {
# access $hit via $_[0]->{Field}, as this means you dont need to return anything (makes it quicker than doing a copy + return)
}