using SUM and GROUP BY when joining tables

Hi everyone,

I'm trying to give my students points for doing various things on my website. Eg: Completing a quiz, getting a certain score, all result in points, which are thrown into a table called points.

Now I'm trying to extract a leaderboard for the table.

I'm halfway there, and have a list of scores ranked from highest to lowest, next to the member's id.

See code below:

$query = "SELECT point_member_id, SUM(points) FROM tbl_points GROUP BY point_member_id ORDER BY SUM(points) DESC"; 
	 
$result = mysql_query($query) or die(mysql_error());

// Print out result
while($row = mysql_fetch_array($result)){
	echo  $row['point_member_id']. " : ". $row['SUM(points)'];
	echo "<br />";
}
	  
	

However, I really don't want point_member_id displaying. I'd like the student's firstname and lastname displaying.

firstname and lastname are the fields 'member_firstname' and 'member_lastname' in the table 'members'.

So what I need to do is extract this information where members.member_id = points.point_member_id

I've tried a bunch of variations to the query and searched ad nauseum, but nothing is helping.

Any advice would be greatly appreciated.

Cheers,

Dave