You are probably familiar with the FIRST_VALUE and LAST_VALUE analytical functions that were introduced some time ago into the Oracle RDBMS, in the 9iR2 release I believe (or at least that is when they made their way into the Standard Edition). These values are used to find the first respectively last value in a window in a partition that has been ordered in a certain way.

Oracle introduces a new, related function in 11gR2, called NTH_VALUE. Instead of simply the first or last value in an analytical window, we can ask for a specific row number, such as 2nd row (ND_VALUE?), the 7th or the 223th. This article shows the syntax for this new function.

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