Hallo allerseits!

ich nutze schon seit einiger Zeit diese Datenbank-Klasse, welche ich seinerzeit auch hier gefunden habe (ein wenig Recherche ergab, dass sie von Johannes Röttger stammte)...

PHP-Code:

class db {

// integer
    var $a_rows = 0;
    var $link_id = 0;
    var $query_id = 0;
    var $errno = 0;
    var $show_error = 0;
    var $mail_error = 0;
    var $port = 0;
    var $query_c = 0;
    var $rows = 0;
// string
    var $errdesc = '';
    var $hostname = '';
    var $username = '';
    var $password = '';
    var $database = '';
    var $techmail = '';
// array 
    var $record = array();


        function connect() {
            if ($this->link_id == 0) {
                if ( ereg(':',$this->hostname) ) {
                    list($host,$port) = explode(':',$this->hostname);
                    $this->port = $port;
                } else {
                    $this->port = 3306;
                }
                $this->link_id = @mysql_connect($this->hostname.':'.$this->port,$this->username,$this->password);
                if ( !$this->link_id ) {
                    return('no_connect');
                }
                if ($this->database != '') {
                    $this->select_db($this->database);
                }
            }
        }


        function select_db( $database = '' ) {
            if ($database != '') {
                $this->database = $database;
            }
            if( !@mysql_select_db($this->database, $this->link_id) ) {
                $this->error("cannot use database ".$this->database);
            }
        }


        function query( $query ) {
            $this->query_id = @mysql_query( $query, $this->link_id );
            $this->query_c++;
            if ( !$this->query_id ) {
                $this->error("Invalid SQL: \"<i>$query</i>\"");
            }
            $this->a_rows = @mysql_affected_rows($this->query_id);
            return $this->query_id;
        }


        function fetch_row( $query_id = -1 ) {
            if ( $query_id != -1) {
                $this->query_id = $query_id;
            }
            $this->record = @mysql_fetch_row( $this->query_id );
            return $this->record;
        }


        function fetch_array( $query_id = -1 ) {
            if ( $query_id != -1) {
                $this->query_id = $query_id;
            }
            $this->record = @mysql_fetch_array( $this->query_id );
            return $this->record;
        }


        function fetch_object( $query_id = -1 ) {
            if ( $query_id != -1) {
                $this->query_id = $query_id;
            }
            $this->record = @mysql_fetch_object( $this->query_id );
            return $this->record;
        }


        function quote($value) {
            return "'". preg_replace("/'/", "''", $value) ."'";
        }


        function free_result ($query_id = -1) {
            if ($query_id != -1) {
                $this->query_id = $query_id;
            }
            return mysql_free_result ($this->query_id);
        }


        function num_rows($query_id = -1) {
            if ($query_id != -1) {
                $this->query_id = $query_id;
            }
            return mysql_num_rows ($this->query_id);
        }


        function insert_id() {
            return mysql_insert_id ($this->link_id);
        }


        function stats($print = 0) {
            if ($print == 0) {
                return $this->query_c;
            } else {
                print ($this->query_c);
            }
        }


        function error() {
            $this->errdesc = mysql_error();
            $this->errno = mysql_errno();
            $message = "Error&nbsp;&nbsp;&nbsp;: $this->errdesc (#$this->errno)<br />\n";
            $message.= "Date&nbsp;&nbsp;&nbsp;&nbsp;: ".date("D, F j, Y H:i:s")."<br />\n";
            $message.= "Script&nbsp;&nbsp;: ".$_SERVER["REQUEST_URI"]."<br />\n";
            $message.= "IP&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: ".$_SERVER["REMOTE_ADDR"]."<br />\n";
            $message.= "Host&nbsp;&nbsp;&nbsp;&nbsp;: ".gethostbyaddr($_SERVER["REMOTE_ADDR"])."<br />\n";
            $message.= "Querys&nbsp;&nbsp;: ".$this->query_c."<br />\n";
            if ($this->show_error == 1) {
                print("
                    <table width=\"700\" cellpadding=\"0\" cellspacing=\"0\" align=\"center\">
                        <tr>
                            <td width=\"700\" style=\"font-family:Tahoma;font-size:8pt;letter-spacing:1px;background:#ffffff;\">$message</td>
                        </tr>
                    </table>");
            }
            if ($this->mail_error == 1) {
                @mail($this->techmail,"mySQL::error",$message,"From: X-Mailer");
            }
        }

    }  // end class 


sooo, was ich aber nicht herausfinden konnte ist, wie ich damit zu 2 Datenbanken verbinde und die SQL-Queries dahingehend schreiben muss... Vielen Dank für Eure Hilfen schonmal!