SELECT *
FROM
  (SELECT
    i_category,
    i_class,
    i_brand,
    i_product_name,
    d_year,
    d_qoy,
    d_moy,
    s_store_id,
    sumsales,
    rank()
    OVER (PARTITION BY i_category
      ORDER BY sumsales DESC) rk
  FROM
    (SELECT
      i_category,
      i_class,
      i_brand,
      i_product_name,
      d_year,
      d_qoy,
      d_moy,
      s_store_id,
      sum(coalesce(ss_sales_price * ss_quantity, 0)) sumsales
    FROM store_sales, date_dim, store, item
    WHERE ss_sold_date_sk = d_date_sk
      AND ss_item_sk = i_item_sk
      AND ss_store_sk = s_store_sk
      AND d_month_seq BETWEEN 1200 AND 1200 + 11
    GROUP BY ROLLUP (i_category, i_class, i_brand, i_product_name, d_year, d_qoy,
      d_moy, s_store_id)) dw1) dw2
WHERE rk <= 100
ORDER BY
  i_category, i_class, i_brand, i_product_name, d_year,
  d_qoy, d_moy, s_store_id, sumsales, rk
LIMIT 100