How To Get Multiple Coordinates Appear On Google Maps

I am having some issues with getting multiple sets of coordinates to appear on google maps on my website. I have many items stored in a database, and each row has a field for latitude and a field for longitude. I get the data like this:

$getdeals = "SELECT * FROM deals WHERE cityid='$cityid'";
$result = mysql_query($getdeals);
while($row = mysql_fetch_array($result)){
$title = $row['title'];
$lat = $row['lat'];
$lng = $row['lng'];
//This is where I think I would try to add the point to the map
}