여러 필드별로 MySQL 결과를 그룹화하고 관련 데이터를 표시하려면 어떻게 해야 합니까?

ID    Group   Name

1       1       John
2       1       Andrea
3       1       Jack
4       2       Mike
5       2       Kurt
6       3       Alice

Group       Name
-----------------------
  1         John
            Andrea
            Jack
-----------------------
  2         Mike
            Kurt
-----------------------
  3         Alice
-----------------------

<code class="sql">SELECT
p.Group as 'group',
GROUP_CONCAT(name) as names
FROM prueba p
GROUP BY p.Group</code>

<code class="php">$result = $dbc->query("
SELECT
p.Group as 'group',
GROUP_CONCAT(name) as names
FROM prueba p
GROUP BY p.Group
");

echo "<table border='1'><tr><th>Group</th><th>Name</th></tr>";
while($row = $result->fetch_assoc()){
    $names = split(",",$row["names"]);
    echo "<tr><td rowspan='".count($names)."'>".$row["group"]."</td><td>".$names[0]."</td></tr>";
    array_shift($names);
    foreach($names as $name){
        echo "<tr><td> </td><td>".$name."</td></tr>";
    }
}
echo "</table>";</code>

ID    meta_key  meta_value   name

1       group     1          John
2       group     1          Andrea
3       group     1          Jack
4       group     2          Mike
5       group     2          Kurt
6       group     3          Alice