SELECT TOP record for each year

Question

I am trying to recap on my sql skill, now I am trying to run a simple query on northwinddb to show me the top customer for each year, but as soon as I use the TOP function o

Answer 1

Thank you for the help. I found a way that allows me to change the number of top customers i want to see for each year. By using Sub queries and Row_Number

SELECT CompanyName
,yr
,Total
FROM(SELECT CompanyName
, yr
, Total
, ROW_NUMBER() OVER(PARTITION BY yr ORDER BY yr, Total DESC) AS RowNumber
FROM(SELECT DISTINCT CompanyName
    , YEAR(O.OrderDate) AS yr
    ,  SUM(OD.Quantity) OVER(PARTITION BY CompanyName
                            , YEAR(O.OrderDate)) As Total
    FROM Customers C JOIN Orders O
        ON C.CustomerID = O.CustomerID JOIN [Order Details] OD
        ON O.OrderID = OD.OrderID) Tr)Tr2
Where RowNumber <= 1