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 (
    128, 51118, 51117, 51116, 51115, 51114, 
    51113, 49, 51132, 51131, 51134, 51133, 
    51130, 41, 51155, 51154, 51153, 51152, 
    21, 51169, 51168, 51167, 51166, 90, 
    51171, 51170, 51183, 20, 51188, 51187, 
    51186, 51185, 51184, 51243, 51242, 
    51241, 51240, 51239, 36, 51294, 51293, 
    51291, 51290, 94, 18, 81, 51318, 51317, 
    51316, 51, 51319, 106, 58, 86, 15, 95, 
    51356, 51355, 44, 31, 51366, 51367, 
    51368, 51369
  ) 
GROUP BY 
  p.product_id