您好，我想为我的表格IDK创建滚动条

Question

<?php

require_once "config.php";


$sql = "SELECT * FROM db";
if($result = mysqli_query($link, $sql)){
    if(mysqli_num_rows($result) > 0){

        echo "<table class='table table-bordered'>";
        echo "<thead>";
            echo "<tr>";
                echo "<th>#</th>";`enter code here`
                echo "<th>Ansprechpartner</th>";
                echo "<th>Firma</th>";
                echo "<th>AddresseHausenummer</th>";
                echo "<th>PLZ</th>";
                echo "<th>Anschrift</th>";
                echo "<th>Telefone</th>";
                echo "<th>Email</th>";
                echo "<th>Kartenanzahl</th>";
                echo "<th>Aktuelleranbieter</th>";
                echo "<th>Bemerkungsfel</th>";
                echo "<th>Action</th>";
            echo "</tr>";
        echo "</thead>";
        echo "<tbody>";

        while($row = mysqli_fetch_array($result)){
            echo "<tr>";
                echo "<td>" . $row['id'] . "</td>";
                echo "<td>" . $row['Ansprechpartner'] . "</td>";
                echo "<td>" . $row['Firma'] . "</td>";
                echo "<td>" . $row['AdresseHausenummer'] . "</td>";
                echo "<td>" . $row['PLZ'] . "</td>";
                echo "<td>" . $row['Anschrift'] . "</td>";
                echo "<td>" . $row['Telefon'] . "</td>";
                echo "<td>" . $row['Email'] . "</td>";
                echo "<td>" . $row['Kartenanzahl'] . "</td>";
                echo "<td>" . $row['Aktuelleranbieter'] . "</td>";
                echo "<td>" . $row['Bemerkungsfel'] . "</td>";
                echo "<td>";
                echo "<a href='read.php?id=". $row['id'] ."' title='Datensatz anzeigen' data-toggle='tooltip'><span class='glyphicon glyphicon-eye-open'></span></a>";
                echo "<a href='update.php?id=". $row['id'] ."' title='Datensatz aktualisieren' data-toggle='tooltip'><span class='glyphicon glyphicon-pencil'></span></a>";
                echo "<a href='delete.php?id=". $row['id'] ."' title='Aufzeichnung löschen' data-toggle='tooltip'><span class='glyphicon glyphicon-trash'></span></a>";
                echo "</td>";
            echo "</tr>";
        }
        echo "</tbody>";                            
        echo "</table>";
        // Free result set
        mysqli_free_result($result);
    } else{
        echo "<p class='lead'><em>No records were found.</em></p>";
    }
} else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}

mysqli_close($link);
?>

            </div>
        </div>        
    </div>
</div>