SQL INTERVIEW QUESTION | Advanced aggregation using ROLLUP

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[@Manifestion_kannada]

Solve more questions on join and analytical functions

[@FromPlanetZX]

Hi, while using UNION ALL method to get the result in required format. I use below method.
with cte as (
Select Product, Region, Sales AS TotalSales
from Sales
UNION ALL
Select Product, NULL as Region , SUM(Sales) AS TotalSales
From Sales
GROUP BY Product
UNION ALL
Select Null as Product, NULL as Region , SUM(Sales) AS TotalSales
From Sales
)
Select * from cte
Order by (CASE WHEN Product IS NULL THEN 'zz' ELSE Product END),
(CASE WHEN Region IS NULL THEN 'zz' ELSE Region END);

[@datasculptor2895]

Nice way to handle the ordering