-- Query 5-2: same as query 5, but with the "grouping" columns

SELECT
    calendar_year_lookup.year,
    outlet_lookup.shop_name,
    (calendar_year_lookup.year IS NULL) as niveau_annee,
    SUM(shop_facts.amount_sold) AS total_amount_sold,
    SUM(shop_facts.quantity_sold) AS total_quantity_sold,
    (outlet_lookup.shop_name IS NULL) as niveau_magasin,
    -- Note: GROUPING_ID is only available on Oracle SQL and MSSQL, so we recreate it here
    (outlet_lookup.shop_name IS NULL) + (calendar_year_lookup.year IS NULL) * 2 as niveau_global
FROM outlet_lookup
INNER JOIN shop_facts ON shop_facts.shop_code = outlet_lookup.shop_code
INNER JOIN calendar_year_lookup ON shop_facts.week_key = calendar_year_lookup.week_key
-- Note: shop_name must be used here instead of shop_code for NULL to be handled properly.
GROUP BY calendar_year_lookup.year ASC, outlet_lookup.shop_name ASC WITH ROLLUP;