How to group returned recordset

My current recordset returns the following:
Africa
   Egypt
Africa
   Namibia
Africa
   Morocco
America, Central
   Mexico
America, North
   United States
America, North
   Canada
How do I group this recordset according to region? So it returns the following (exercise taken from a book):
Africa
   Egypt
   Namibia
   Morocco
America, Central
   Mexico
America, North
   United States
   Canada
MySQL select statement:
mysql_select_db($database_conn_newland, $conn_newland);
$query_rs_countriesbyregion = "SELECT countryID, region, countryName, regionID, regionName FROM tbl_country, tbl_region WHERE tbl_country.region = tbl_region.regionID ORDER BY regionName ASC";
$rs_countriesbyregion = mysql_query($query_rs_countriesbyregion, $conn_newland) or die(mysql_error());
$row_rs_countriesbyregion = mysql_fetch_assoc($rs_countriesbyregion);
$totalRows_rs_countriesbyregion = mysql_num_rows($rs_countriesbyregion);mysql_select_db($database_conn_newland, $conn_newland);
My table code:
<body>
<h2><strong>Group by Region:</strong></h2>
<table width="30%" border="0" cellspacing="0" cellpadding="3">
<?php do { ?>
    <tr>
      <td scope="col"><strong><?php echo $row_rs_countriesbyregion['regionName']; ?></strong></td>
    </tr>
    <tr>
      <td>    <?php echo $row_rs_countriesbyregion['countryName']; ?></td>
    </tr>
    <?php } while ($row_rs_countriesbyregion = mysql_fetch_assoc($rs_countriesbyregion)); ?>
</table>
Kindly help, or point me to a web resource.

Is there anyone who can help a newbie - i need to group records according to regions, then list the countries within each region: Example:
Africa
   Egypt
   Namibia
   Morocco
America, Central
   Mexico
America, North
   United States
   Canada
this exercise was from the book by Jeffrey Bardzell and Bob Flynn. Kindly refer to my previous post re the code. Please help!

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