In SQL, I need to generate a ranking (1st, 2nd, 3rd) column, getting stuck on “ties”

Question

I have a query that calculates points based on multiple criteria, and then orders the result set based on those points.

SELECT * FROM (
    SELECT
         dbo.afunctionthatcalculates(Something, Something) AS Points1
        ,dbo.anotherone(Something, Something) AS Points2
        ,dbo.anotherone(Something, Something) AS Points3
        ,[TotalPoints] = dbo.function(something) + dbo.function(something) 
) AS MyData
ORDER BY MyData.TotalPoints 

So my first stab at adding placement, rankings.. was this:

SELECT ROW_NUMBER() OVER(MyData.TotalPoints) AS Ranking, * FROM (
    SELECT same as above
) AS MyData
ORDER BY MyData.TotalPoints

This adds the Rankings column, but doesn't work when the points are tied.

Rank  |  TotalPoints
--------------------
1        100
2        90
3        90
4        80

Should be:

Rank  |  TotalPoints
--------------------
1        100
2         90
2         90
3         80

Not really sure about how to resolve this.

Thank you for your help.

Answer 1

您应该使用DENSE_RANK()函数，该函数考虑了联系，如此处所述： http : //msdn.microsoft.com/zh-cn/library/ms173825.aspx

Answer 2

DENSE_RANK（）而不是ROW_NUMBER（）