This page is a quick reference checkpoint for NTH VALUE in SQL Server: behavior, syntax rules, edge cases, and a minimal example; plus the official vendor documentation.
NTH_VALUE returns the value from the nth row in the window frame.
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If this behavior feels unintuitive, the tutorial below explains the underlying pattern step-by-step.
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If you came here to confirm syntax, you’re done. If you came here to get better at window functions, choose your next step.
NTH VALUE is part of a bigger window-function pattern. If you want the “why”, start here: First Last Nth Value
For the authoritative spec, use the vendor docs. This page is the fast “sanity check”.
View SQL Server Documentation →Looking for more functions across all SQL dialects? Visit the full SQL Dialects & Window Functions Documentation.