public inbox for [email protected]  

help / color / mirror / Atom feed

From: Tom Lane <[email protected]>
To: Ankit Kumar Pandey <[email protected]>
Cc: [email protected]
Subject: Re: [QUESTION] Window function with partition by and order by
Date: Sun, 27 Nov 2022 11:28:04 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

Ankit Kumar Pandey <[email protected]> writes:
> Question is: Average of id for partition name (A) should be 6/4 = 1.5 
> for all rows in that partition but this result is seen only at the last 
> one row in partition (A). Am I missing here something?

https://www.postgresql.org/docs/current/tutorial-window.html

particularly:

    By default, if ORDER BY is supplied then the frame consists of all
    rows from the start of the partition up through the current row, plus
    any following rows that are equal to the current row according to the
    ORDER BY clause.

			regards, tom lane

view thread (7+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected]
  Subject: Re: [QUESTION] Window function with partition by and order by
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox