SELECT
      description,
      sku,
      level2,
      level3,
      revenue,
      quantity,
      trend
    from
      (
        SELECT
        *,
          ROW_NUMBER () OVER (
            PARTITION BY level2
            ORDER BY
              SUM(revenue) DESC
          ) rownum,
          SUM(revenue) OVER (PARTITION BY level2) total,
          ROUND(SUM(revenue), 2) as revenue,
          SUM(quantity) as quantity,
          trend
        FROM
          (
            select
              *,
              cast(past as float) / 3 as past,
              round(
                cast(present as float) /(cast(past as float) / 3.0),
                2
              ) as trend
            from
              (
                select
                  *,
                  sum(quantity) FILTER (
                    WHERE
                      year = $year
                      and month between $($month - 4)
                      and $($month - 1)
                  ) over (PARTITION BY description) as past,
                  sum(quantity) FILTER (
                    WHERE
                      year = $year
                      and month = %[2]s
                  ) over (PARTITION BY description) as present
                from
                  data
              )
          )
        where
          year = %[1]s
          and month = %[2]s
        GROUP BY
          description
        ORDER BY
          total DESC
      )
    WHERE
      rownum <= 10
      and revenue > 0
    order by
      (sum(revenue) over (
        partition by level2
      )) desc;