SELECT 
  cscart_products_categories.product_id, 
  GROUP_CONCAT(
    IF(
      cscart_products_categories.link_type = "M", 
      CONCAT(
        cscart_products_categories.category_id, 
        "M"
      ), 
      cscart_products_categories.category_id
    )
  ) AS category_ids 
FROM 
  cscart_products_categories 
  INNER JOIN cscart_categories ON cscart_categories.category_id = cscart_products_categories.category_id 
  AND cscart_categories.storefront_id IN (0, 1) 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
WHERE 
  cscart_products_categories.product_id IN (
    101808, 101807, 101806, 101805, 101804, 
    101803, 101802, 101801, 101800, 101799, 
    101798, 101797, 101796, 101795, 101794, 
    101793, 101792, 101791, 101790, 101789, 
    101788, 101787, 101786, 101785, 101784, 
    101783, 101782, 101781, 101780, 101779
  ) 
GROUP BY 
  cscart_products_categories.product_id