SELECT 
  p.product_id, 
  ifnull(
    count(dp.post_id), 
    0
  ) as discussion_amount_posts 
FROM 
  cscart_discussion 
  INNER JOIN cscart_products as p ON (
    cscart_discussion.object_id = p.product_id
  ) 
  INNER JOIN cscart_discussion_posts as dp ON (
    cscart_discussion.thread_id = dp.thread_id 
    AND cscart_discussion.object_type = 'P' 
    AND cscart_discussion.company_id = 1
  ) 
WHERE 
  dp.status = 'A' 
  and p.product_id in (
    51132, 51131, 51134, 51133, 51130, 41, 
    51146, 51145, 38, 51148, 51147, 51150, 
    51149, 37, 51169, 51168, 51167, 51166, 
    90, 51171, 51170, 51209, 51208, 51207, 
    51206, 124, 51221, 137, 51224, 51223, 
    126, 115, 81, 11, 51357, 51360, 51359, 
    51358, 51361, 30, 51362, 51363, 51364, 
    51365, 31, 51366, 51367, 51368, 51369, 
    140, 51385, 51386, 51387, 51388, 51389, 
    88, 51395, 51396, 51397, 51555, 51556, 
    80, 51398, 51399
  ) 
GROUP BY 
  p.product_id