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 (
    51165, 51164, 51163, 51162, 51161, 52, 
    51194, 51193, 51192, 51191, 51190, 
    51189, 19, 51201, 51200, 51199, 51198, 
    51197, 51196, 51195, 131, 111, 51212, 
    144, 51215, 51214, 51213, 51444, 51445, 
    51446, 51447, 51231, 51230, 51229, 
    51228, 51227, 51226, 51225, 109, 51272, 
    51271, 51270, 51269, 51268, 51267, 
    51266, 145, 9, 59, 60, 14, 13, 127, 51325, 
    63, 50984, 51450, 51451, 51329, 51328, 
    51327, 50985, 51331, 51330, 50986, 
    51332, 51339, 51338, 51337, 51336, 
    50988, 113, 51346, 118, 84, 51347, 85, 
    6, 61, 51350, 123, 15, 95, 136, 50992, 
    51374, 51375, 42, 51376, 51377, 51378, 
    51379, 51380, 50993, 51381, 51382, 
    134
  ) 
GROUP BY 
  p.product_id