Building Complex Sql queries using group by, having, Rank and top functions

Sql Query with Where clause

select
ProductSubcategoryID, size, StandardCost, ListPrice, class, style
from
Production.Product
where
ProductSubcategoryID is not null and
size is not null and
StandardCost <> 0.00 and
ListPrice <> 0.00 and
class is not null and
style is not null

-- Complex SQL query with where, group by, having clauses and top, rank, dense_rank, row functions

select
Top 20
ProductSubcategoryID,
Max(StandardCost) as MaximumStdCost,
Max(ListPrice) as MaxListPrice,
Max(ListPrice) - Max(StandardCost) as MaxDifferenceStandardFin,
Max(ListPrice) / Max(StandardCost) as CostPriceRatio,
Rank() over( Order by(Max(ListPrice) / Max(StandardCost)) Desc) as DistinctRankMaximumCostPriceRatio,
Row_Number() over( Order by(Max(ListPrice) / Max(StandardCost)) Desc) as RankMaximumCostPriceRatio,
DENSE_RANK() over( Order by(Max(ListPrice) / Max(StandardCost)) Desc) as DistinctRankwithNextSequence
from
Production.Product
where
ProductSubcategoryID is not null and
StandardCost <> 0.00 and
ListPrice <> 0.00
Group by
ProductSubcategoryID
having
Max(ListPrice) / Max(StandardCost) > 2.2
order by
Max(ListPrice) / Max(StandardCost) desc

Watch the below video for more details

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