การใช้ group concat ตอนแสดงผลออกแค่ค่าเดียว ช่วยแก้ไขทีครับ

	$strSQL = "SELECT * , GROUP_CONCAT( sta_phone SEPARATOR  ',' ) FROM staff
	LEFT JOIN staff_phone ON staff.sta_id = staff_phone.sta_id
	LEFT JOIN type_staff ON staff.type_sta_id=type_staff.type_sta_id	GROUP BY staff.sta_id";
	$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");

<?
$i=0;
while($objResult = mysql_fetch_array($objQuery))
{
	$i++;
?>
                  <tr class="row">
                    <td align="center"><?=$i;?></td>
                    <td><?=$objResult["sta_name"];?></td>
                    <td><?=$objResult["sta_last_name"];?></td>
                    <td><?=$objResult["type_sta_name"];?></td>
                    <td><?=$objResult["sta_phone"];?>
                    </td>
                    <td align="center"><a  href="edit_staff.php?sta_id=<?=$objResult["sta_id"];?>" id="edit"><img src="../img/icon/pencil.png" width="20" height="20" alt="แก้ไข"></a></td>
                    <td align="center"><a href="del_staff.php?sta_id=<?=$objResult["sta_id"];?>" class="ask-custom"><img src="../img/icon/trash.png" width="20" height="20" alt="ลบ"></a></td>
                    <td align="center"><a href="view_staff.php?sta_id=<?=$objResult["sta_id"];?>" id="view"><img src="../img/icon/preview.png" width="20" height="20" alt="พรีวิว"></a></td>
                  </tr>
 <?
}
?>