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 (
    51088, 51087, 22713, 51086, 51089, 51090, 
    51092, 51093, 22714, 51091, 51095, 
    51103, 22712, 51105, 51102, 51101, 
    51155, 51154, 51153, 51152, 21, 51158, 
    51157, 51156, 53, 51160, 51159, 51297, 
    51296, 139, 51300, 51299, 51298, 51304, 
    51303, 51302, 51301, 138, 51443, 51309, 
    51308, 51307, 51306, 51305, 129, 51318, 
    51317, 51316, 51, 51319, 51323, 51322, 
    51321, 51320, 50, 51324, 51497, 51498, 
    51564, 51568, 51569, 51570, 51571, 
    51572, 51573, 51565, 51574, 51575, 
    51576, 51577, 51566, 51578, 51579, 
    51580, 51581, 51567, 51582, 51583, 
    51584, 51585, 51586
  ) 
GROUP BY 
  p.product_id