contar valores em db

<table border="1" width="100%" id="table1">
<?php
    $query = mysql_query("SELECT sku, SUM(quan) AS Sum_Of_Quan FROM   pickcount GROUP BY sku");
    while($fetch = mysql_fetch_array($query))
    {
?>
    <tr>
        <td><?php echo $fetch['sku']; ?></td>
        <td><?php echo $fetch['Sum_Of_Quan']; ?></td>
    </tr>
<?php
}
?>  
</table>