row_number()

Returns the number of the current row within its partition, counting from 1.

Signature

row_number () → bigint

Examples

SELECT product, row_number() OVER (ORDER BY id) FROM orders;

 product  | row_number 
----------+------------
 keyboard |          1
 monitor  |          2
 keyboard |          3
 mouse    |          4
 monitor  |          5
 cable    |          6
(6 rows)

Run against PostgreSQL 18.6 on 2026-09-13. This is the output we got, not the documentation’s.

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