This page is a quick reference checkpoint for PERCENT_RANK in ORACLE: behavior, syntax rules, edge cases, and a minimal example; plus the official vendor documentation.
PERCENT_RANK returns a row's relative rank as a percentage between 0 and 1.
Behavior: Computes the percent rank of a row within its partition: (rank - 1) / (rows_in_partition - 1). Returns 0 for the first row in the ordered partition.
If this behavior feels unintuitive, the tutorial below explains the underlying pattern step-by-step.
Syntax: PERCENT_RANK() OVER (analytic_clause). No arguments allowed.
SELECT last_name, salary, PERCENT_RANK() OVER (ORDER BY salary) AS pr FROM employees;
If you came here to confirm syntax, you’re done. If you came here to get better at window functions, choose your next step.
PERCENT_RANK is part of a bigger window-function pattern. If you want the “why”, start here: Percentile Distribution
Reading docs is useful. Writing the query correctly under pressure is the skill.
For the authoritative spec, use the vendor docs. This page is the fast “sanity check”.
View ORACLE Documentation →Looking for more functions across all SQL dialects? Visit the full SQL Dialects & Window Functions Documentation.