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In this blog post we will discuss about Ranking Functions like RANK( ), DENSE_RANK( ), and ROW_NUMBER( ).
Ranking Functions (Part 1)
There are four ranking functions in SQL server. Today we will look at RANK( ), DENSE_RANK( ), and ROW_NUMBER( ).These functions all have the same basic behavior. Where they differ is in the handling of tie values. These three functions produce identical results, until a tying value in your data is present.