percent_rank

Computes the relative rank of the hypothetical row, that is (rank - 1) / (total rows - 1). The value thus ranges from 0 to 1 inclusive.

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group: aggregate
group label: 聚合函数
lang: en
layout: table-new
pages: functions-aggregate.html, functions-window.html
prose only: false

Definition PG 18

Computes the relative rank of the hypothetical row, that is (rank - 1) / (total rows - 1). The value thus ranges from 0 to 1 inclusive.

Signatures and overloads

percent_rank ( args ) WITHIN GROUP ( ORDER BY sorted_args ) → double precision → double precision

Computes the relative rank of the hypothetical row, that is (rank - 1) / (total rows - 1). The value thus ranges from 0 to 1 inclusive.

percent_rank () → double precision → double precision

Returns the relative rank of the current row, that is (rank - 1) / (total partition rows - 1). The value thus ranges from 0 to 1 inclusive.

Compare versions

Complete source facts

documentation revision

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Source references

Original manual reference

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:5c084c8302f4f9f8c79fd7474b04c5a763d7e68078385eed4d99cbc0030a2fca

Text language: en · wiki-repair-20261023:5c084c8302f4f9f8c79fd7474b04c5a763d7e68078385eed4d99cbc0030a2fca