$sql =<<"SELECT * FROM tbl_admin WHERE day = '$d' AND month = '$m_num' AND year = '$y' AND expal = '?' AND status= '2'";

if($order == 2 ) {
    $sql .= " ORDER BY c_name";
}
elsif ($order == 3 ) {
    $sql .= " ORDER BY expal";            
}

$sth = $dbh->prepare($sql);

foreach my $key_expal (keys %expal) {
    $sth->execute($key_expal) || die $sth->errstr;

    while ($pointer = $sth->fetchrow_hashref) {
        my $expalnum  = $pointer->{'expal'};
        my $comp      = $pointer->{'c_name'};        
        my $cltime    = $pointer->{'time'};
        my $cltime2   = $pointer->{'time2'};
        my $last_name = $pointer->{'last_name'};
        my $clnum     = $pointer->{'c_number'};
        my $status    = $pointer->{'status'};
        print "<br>L 265 - <b>$comp</b> $expalnum";
    }
}

##</code><code>##

$sql = "SELECT * FROM tbl_admin WHERE day = '$d' AND month = '$m_num' and year = '$y' AND expal IN (".join(',',keys %expal).") AND status= '2'";