Unnamed

$result = array();
    $quartalId = array();
    foreach($query as $key) {
      if(array_key_exists($key['jahr'], $result)) {
        $quartalId[$key['quartalId']] = $key['gewicht'];
        $result[$key['jahr']] = $quartalId;
      } else {
        $result[$key['jahr']] = $key['jahr'];
        $quartalId[$key['quartalId']] = $key['gewicht'];
        $result[$key['jahr']] = $quartalId;
      }
    }