This page is a quick reference checkpoint for NTH VALUE in SQLite: 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.
Returns the value of expr from the nth row of the window frame; depends on ORDER BY and frame; returns NULL if n is out of range
If this behavior feels unintuitive, the tutorial below explains the underlying pattern step-by-step.
Syntax: NTH_VALUE(expr, n) OVER ([PARTITION BY ...] [ORDER BY ...] [frame])
SELECT val, NTH_VALUE(val, 3) OVER (ORDER BY val ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS nth_val FROM t;
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 SQLite Documentation →Looking for more functions across all SQL dialects? Visit the full SQL Dialects & Window Functions Documentation.