Roles Based Top Customer

global $wpdb;

$sql = "";
$sql .= "SELECT SUM(wc_postmeta1.meta_value) AS 'Total'
,wc_postmeta2.meta_value AS 'BillingEmail'
,CONCAT(wc_postmeta3.meta_value, ' ',wc_postmeta5.meta_value) AS BillingName
,Count(wc_postmeta2.meta_value) AS 'OrderCount' FROM ";
$sql .= "{$wpdb->prefix}posts as wc_posts
JOIN  {$wpdb->prefix}users as wc_users6
JOIN  {$wpdb->prefix}usermeta as wc_usermeta6 ON wc_usermeta6.user_id=wc_users6.ID
LEFT JOIN  {$wpdb->prefix}postmeta as wc_postmeta1 ON wc_postmeta1.post_id=wc_posts.ID
LEFT JOIN  {$wpdb->prefix}postmeta as wc_postmeta2 ON wc_postmeta2.post_id=wc_posts.ID
LEFT JOIN  {$wpdb->prefix}postmeta as wc_postmeta3 ON wc_postmeta3.post_id=wc_posts.ID
LEFT JOIN  {$wpdb->prefix}postmeta as wc_postmeta5 ON wc_postmeta5.post_id=wc_posts.ID";
$sql .= " WHERE wc_posts.post_type='shop_order'
AND wc_postmeta1.meta_key='_order_total'
AND wc_postmeta2.meta_key='_billing_email'
AND wc_postmeta3.meta_key='_billing_first_name'
AND wc_postmeta5.meta_key='_billing_last_name'
AND wc_usermeta6.meta_key = 'wp_capabilities'
AND wc_usermeta6.meta_value LIKE '%Goldmember%'";

$sql .= " AND  wc_posts.post_status IN ('wc-completed','wc-processing')";
$sql .= " AND  MONTH(wc_posts.post_date) = MONTH(CURRENT_DATE())AND YEAR(wc_posts.post_date) = YEAR(CURRENT_DATE())";
$sql .= " GROUP BY  wc_postmeta2.meta_value";
$sql .= " Order By Total DESC";
$sql .= " LIMIT 0,10";
$result = $wpdb->get_results($sql, OBJECT);

echo"<table>";
  echo "<tr>";
  echo "<th>No</th>";
  echo "<th>Nama</th>";
  echo "<th>Order</th>";
  echo "<th>Belian (RM)</th>";
  echo "</tr>";
	$i=1;
foreach ($result as $customer) {
  echo "<tr>";
  echo "<td>$i</td>";
  echo "<td>$customer->BillingName</td>";
  echo "<td>$customer->OrderCount</td>";
  echo "<td>$customer->Total</td>";
  echo "</tr>";
  $i++;
}
echo"</table>";