Re: avg,first,last,median in one query

Поиск
Список
Период
Сортировка
От Jim Nasby
Тема Re: avg,first,last,median in one query
Дата
Msg-id 56F4A2A8.4080901@BlueTreble.com
обсуждение исходный текст
Ответ на avg,first,last,median in one query  (Konstantin Knizhnik <k.knizhnik@postgrespro.ru>)
Список 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



В списке pgsql-hackers по дате отправления:

Предыдущее
От: Jim Nasby
Дата:
Сообщение: Re: Alter or rename enum value
Следующее
От: Stephen Frost
Дата:
Сообщение: Re: Show dropped users' backends in pg_stat_activity