Re: need some magic with generate_series()

From: jan zimmek <jan(dot)zimmek(at)web(dot)de>
To: Andreas <maps(dot)on(at)gmx(dot)net>
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: need some magic with generate_series()
Date: 2013-01-22 21:49:56
Message-ID: 1B56ACCA-3259-4AF6-9EBA-7045E261B18F@web.de
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hi andreas,

this might give you an idea how to generate series of dates (or other datatypes):

select g, (current_date + (g||' month')::interval)::date from generate_series(1,12) g;

regards
jan

Am 22.01.2013 um 22:41 schrieb Andreas <maps(dot)on(at)gmx(dot)net>:

> Hi
> I need a series of month numbers like 201212, 201301 YYYYMM to join other sources against it.
>
> I've got a table that describes projects:
> projects ( id INT, project TEXT, startdate DATE )
>
> and some others that log events
> events( project_id INT, createdate DATE, ...)
>
> to show some statistics I have to count events and present it as a view with the project name and the month as YYYYMM starting with startdate of the projects.
>
> My problem is that there probaply arent any events in a month but I still need this line in the output.
> So somehow I need to have a select that generates:
>
> project 7,201211
> project 7,201212
> project 7,201301
>
> It'd be utterly cool to get this for every project in the projects table with one select.
>
> Is there hope?
>
>
> --
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