This page is a quick reference checkpoint for LAST VALUE in Postgres: behavior, syntax rules, edge cases, and a minimal example; plus the official vendor documentation.
LAST_VALUE returns the last value in the window frame.
Returns the value of the last row in the window frame; with the default frame the result may reflect only rows up to the current row unless the frame is adjusted.
If this behavior feels unintuitive, the tutorial below explains the underlying pattern step-by-step.
LAST_VALUE(value) is listed as a window function and requires an OVER clause.
SELECT LAST_VALUE(salary) OVER (ORDER BY salary ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) FROM empsalary;
If you came here to confirm syntax, you’re done. If you came here to get better at window functions, choose your next step.
LAST 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 Postgres Documentation →Looking for more functions across all SQL dialects? Visit the full SQL Dialects & Window Functions Documentation.