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 (
    154479, 154480, 155225, 162940, 183314, 
    183803, 230989, 238557, 242642, 251715, 
    285163, 308210, 311257, 317943, 30150, 
    163242, 163892, 170742, 175508, 183620, 
    183941, 204777, 225113, 230958
  ) 
GROUP BY 
  p.product_id