From: Andreas <maps.on@gmx.net>
To: pgsql-sql@postgresql.org
Subject: Need magic for a moving statistic
Date: Fri, 02 Oct 2009 03:06:57 +0200
Message-ID: <4AC55231.2080008@gmx.net> (raw)
Hi,
I need some magic for a moving statistic that works on a rather big
table starting at a given date within the table up until now.
The statistic will count events allways on fridays over periods of 2
weeks before ... biweekly?
So I'd like to get a line every 2 weeks for everthing between.
I sadly don't know how to spell that does:
collect data where insert_date between friday1 and friday1 +
inteval '2 week'
collect data where insert_date between friday1 + inteval '2 week'
+ inteval '1 second' and friday1 + inteval '4 week'
collect data where insert_date between friday1 + inteval '4 week'
+ inteval '1 second' and friday1 + inteval '6 week'
Is this possible ?
regards
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: pgsql-sql@postgresql.org
Cc: maps.on@gmx.net
Subject: Re: Need magic for a moving statistic
In-Reply-To: <4AC55231.2080008@gmx.net>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox