INSERT INTO cscart_product_popularity (
  `viewed`, `added`, `deleted`, `bought`, 
  `total`, `product_id`
) 
VALUES 
  (1, 0, 0, 0, 3, 81637) ON DUPLICATE KEY 
UPDATE 
  viewed = viewed + 1, 
  added = added + 0, 
  deleted = deleted + 0, 
  bought = bought + 0, 
  total = total + 3