Обсуждение: FW: SQL rolling window without aggregation
It seems like it’s not been sent to the SQL group, so I’m trying with this group.
Thanks,
Suya
From: Huang, Suya
Sent: Friday, December 05, 2014 6:25 PM
To: 'pgsql-sql@postgresql.org'
Subject: [SQL] rolling window without aggregation
Hi SQL experts,
I’ve got a question here, is that possible to implement a window function without aggregation? Any SQL could get below desired result?
For example:
Table input
date | id
------------+--------
2014-04-26 | A
2014-05-03 | B
2014-05-10 | C
2014-05-17 | D
2014-05-24 | E
2014-05-31 | F
Expected output, use 2 week roll up as an example:
date | id
------------+--------
2014-04-26 | A
2014-05-03 | A
2014-05-03 | B
2014-05-10 | B
2014-05-10 | C
2014-05-17 | C
2014-05-17 | D
2014-05-24 | D
2014-05-24 | E
2014-05-31 | E
2014-05-31 | F
Thanks,
Suya
It seems like it’s not been sent to the SQL group, so I’m trying with this group.
Thanks,
Suya
From: Huang, Suya
Sent: Friday, December 05, 2014 6:25 PM
To: 'pgsql-sql@postgresql.org'
Subject: [SQL] rolling window without aggregation
Hi SQL experts,
I’ve got a question here, is that possible to implement a window function without aggregation? Any SQL could get below desired result?
For example:
Table input
date | id
------------+--------
2014-04-26 | A
2014-05-03 | B
2014-05-10 | C
2014-05-17 | D
2014-05-24 | E
2014-05-31 | F
Expected output, use 2 week roll up as an example:
date | id
------------+--------
2014-04-26 | A
2014-05-03 | A
2014-05-03 | B
2014-05-10 | B
2014-05-10 | C
2014-05-17 | C
2014-05-17 | D
2014-05-24 | D
2014-05-24 | E
2014-05-31 | E
2014-05-31 | F
Thanks,
Suya
Huang, Suya wrote > It seems like it's not been sent to the SQL group, so I'm trying with this > group. Asked and answered...online archives follow http://postgresql.nabble.com/rolling-window-without-aggregation-td5829344.html#a5829345 http://www.postgresql.org/message-id/1417764928965-5829345.post@n5.nabble.com David J. -- View this message in context: http://postgresql.nabble.com/FW-GENERAL-SQL-rolling-window-without-aggregation-tp5829528p5829564.html Sent from the PostgreSQL - general mailing list archive at Nabble.com.
-----Original Message----- From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of David G Johnston Sent: Monday, December 08, 2014 1:18 PM To: pgsql-general@postgresql.org Subject: Re: FW: [GENERAL] SQL rolling window without aggregation Huang, Suya wrote > It seems like it's not been sent to the SQL group, so I'm trying with > this group. Asked and answered...online archives follow http://postgresql.nabble.com/rolling-window-without-aggregation-td5829344.html#a5829345 http://www.postgresql.org/message-id/1417764928965-5829345.post@n5.nabble.com David J. ============================================================================================================ Thanks Dave. I was trying to avoid UNION... -- View this message in context: http://postgresql.nabble.com/FW-GENERAL-SQL-rolling-window-without-aggregation-tp5829528p5829564.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
-----Original Message-----
From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of David G Johnston
Sent: Monday, December 08, 2014 1:18 PM
To: pgsql-general@postgresql.org
Subject: Re: FW: [GENERAL] SQL rolling window without aggregation
Huang, Suya wrote
> It seems like it's not been sent to the SQL group, so I'm trying with
> this group.
Asked and answered...online archives follow
http://postgresql.nabble.com/rolling-window-without-aggregation-td5829344.html#a5829345
http://www.postgresql.org/message-id/1417764928965-5829345.post@n5.nabble.com
David J.
============================================================================================================
Thanks Dave. I was trying to avoid UNION...