Remove content from Drupal by content type

Remove content from Drupal

$node_type = 'lease';
  
  //fetch the nodes we want to delete
  $result = db_query("SELECT nid FROM {node} WHERE type='%s'",$node_type);
  while ($row = db_fetch_object($result)){
    node_delete($row->nid);
    $deleted_count+=1;
  }
  //simple debug message so we can see what had been deleted.
  drupal_set_message("$deleted_count nodes have been deleted");