Check article assigned Membership Level ID

If anyone is interested here is how I solved it :

$sqlQuery = "SELECT m.id, m.name FROM $wpdb->pmpro_memberships_pages mp LEFT JOIN $wpdb->pmpro_membership_levels m ON mp.membership_id = m.id WHERE mp.page_id = '" . $post->ID . "'";

 $post_membership_levels = $wpdb->get_results($sqlQuery);

    foreach($post_membership_levels as $level)
        {
            $post_membership_levels_ids[] = $level->id;
            $post_membership_levels_names[] = $level->name;
        }