select asceding.rnk, i1.i_product_name best_performing, i2.i_product_name worst_performing
from (select *
      from (select item_sk, rank() over (order by rank_col asc) rnk
            from (select ss_item_sk item_sk, avg(ss_net_profit) rank_col
                  from store_sales ss1
                  where ss_store_sk = 4
                  group by ss_item_sk
                  having avg(ss_net_profit) > 0.9 * (select avg(ss_net_profit) rank_col
                                                     from store_sales
                                                     where ss_store_sk = 4
                                                       and ss_addr_sk is null
                                                     group by ss_store_sk)) V1) V11
      where rnk < 11) asceding,
     (select *
      from (select item_sk, rank() over (order by rank_col desc) rnk
            from (select ss_item_sk item_sk, avg(ss_net_profit) rank_col
                  from store_sales ss1
                  where ss_store_sk = 4
                  group by ss_item_sk
                  having avg(ss_net_profit) > 0.9 * (select avg(ss_net_profit) rank_col
                                                     from store_sales
                                                     where ss_store_sk = 4
                                                       and ss_addr_sk is null
                                                     group by ss_store_sk)) V2) V21
      where rnk < 11) descending,
     item i1,
     item i2
where asceding.rnk = descending.rnk
  and i1.i_item_sk = asceding.item_sk
  and i2.i_item_sk = descending.item_sk
order by asceding.rnk limit 100
