my $row = $dbh->selectall_arrayref(...)

##</code><code>##

$row->[0]->[0]

##</code><code>##

my $row = $dhb->selectall_hashref(...)

##</code><code>##

my $rows = $dbh->selectall_hashref(...);
...
foreach my $hashref (@$rows)
{
    $hashref->{'g_afsluttet'}
        = con_date($hashref->{'g_afsluttet'});
}
...
$tmpl->param(LOOP => $rows);