Python3_workout/4-2.sql at master · Manix049/Python3_workout · GitHub

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-- Enhanced aggregations with grouping sentences
select
    ordermonthyear as OrderMonth,
    productcategory as Category,
    sum(saleamount) as TotalSales
from
    sales_all_years
where
    lower(ordermonthyear) != 'ordermonthyear'
group by
    ordermonthyear,
    productcategory
-- enhancing
grouping sets
    (ordermonthyear, productcategory) -- same as union of two queries with group by of a and b separately


-- get both individually and the combo. Identify which using GROUPING__ID
select
    ordermonthyear as OrderMonth,
    productcategory as Category,
    GROUPING__ID as Grp,
    sum(saleamount) as TotalSales

from
    sales_all_years
where
    lower(ordermonthyear) != 'ordermonthyear'
group by
    ordermonthyear,
    productcategory
-- enhancing
grouping sets
    ((ordermonthyear, productcategory), ordermonthyear, productcategory)