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 (
    51076, 51073, 51072, 51074, 51075, 22711, 
    22710, 51077, 51080, 51078, 51079, 
    51357, 51360, 51359, 51358, 51361, 
    30, 51362, 51363, 51364, 51365, 31, 
    51366, 51367, 51368, 51369, 46, 51370, 
    51371, 51372, 51373, 51452, 51453, 
    42, 51376, 51377, 51378, 51379, 51380
  ) 
GROUP BY 
  p.product_id