Re: Merging timeseries in postgres
| От | Begin Daniel |
|---|---|
| Тема | Re: Merging timeseries in postgres |
| Дата | |
| Msg-id | CY1PR10MB04742418B7BE0C7B31BABE6294320@CY1PR10MB0474.namprd10.prod.outlook.com обсуждение исходный текст |
| Ответ на | Re: Merging timeseries in postgres ("David G. Johnston" <david.g.johnston@gmail.com>) |
| Ответы |
Re: Merging timeseries in postgres
|
| Список | pgsql-general |
From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of David G. Johnston
Sent: Thursday, 14 July, 2016 08:23
To: Nick Babadzhanian
Cc: Tim Smith; pgsql-general
Subject: Re: [GENERAL] Merging timeseries in postgres
On Thu, Jul 14, 2016 at 8:18 AM, Nick Babadzhanian <nb@cobra.ru> wrote:
Whats exactly is wrong with the following query?
select
dx date,
nx,
nx1
from
test t
join test1 t1 on t.dx=t1.dx1
;
Please don't top-post.
test t join test1 t1 -- this is the default inner join, your query returns no records for the given data.
David J.
Look at the above documentation (7.2.1.1) on full join
https://www.postgresql.org/docs/9.3/static/queries-table-expressions.html
select coalesce(dx,dx1)as dt, n, nx1
from test full join test1 on dx=dx1;
Daniel
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