| From: | Jim Nasby <Jim(dot)Nasby(at)BlueTreble(dot)com> |
|---|---|
| To: | Konstantin Knizhnik <k(dot)knizhnik(at)postgrespro(dot)ru>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: avg,first,last,median in one query |
| Date: | 2016-03-25 02:30:00 |
| Message-ID: | 56F4A2A8.4080901@BlueTreble.com |
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| Lists: | pgsql-hackers |
On 3/24/16 9:00 AM, Konstantin Knizhnik wrote:
> But unfortunately it is not possible to calculate median is such way
> because percentile_disc is not compatible with OVER:
I don't know if you could use cume_dist()[1] to do this, but even if you
can't it probably wouldn't be hard to modify it to do what you need.
[1] http://www.postgresql.org/docs/9.5/static/functions-window.html
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
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