Views: Relationship with webform submission
You have to use hook_views_data_alter for node and webform submissions relation in view.

function mymodule_views_data_alter(&amp;$data) {
  if (isset($data['webform_submitted_data']['data_numeric'])) {
    if (!isset($data['webform_submitted_data']['data_numeric']['relationship'])) {
      $data['webform_submitted_data']['data_numeric']['relationship'] = array (
        'handler' =&gt; 'views_handler_relationship',
        'base' =&gt; 'node',
        'base field' =&gt; 'nid',
        'label' =&gt; t('Referred node'),
      );
    }
  }
}