From: Jim Buttafuoco <jim@contactbda.com>
To: Aaron Bingham <bingham@cenix-bioscience.com>
To: pgsql-sql@postgresql.org
Subject: Re: Generating a range of integers in a query
Date: Wed, 13 Jul 2005 09:22:32 -0400
Message-ID: <20050713132129.M45696@contactbda.com> (raw)
In-Reply-To: <l87jfvcbml.fsf@lynx.cenix-bioscience.com>
References: <l87jfvcbml.fsf@lynx.cenix-bioscience.com>
I use the following function which returns a date series. You can modify it to return an int series instead
create or replace function alldates(date,date) returns setof date
as
'
declare
s alias for $1;
e alias for $2;
d date;
begin
d := s;
while d <= e
LOOP
return next d;
select d + \'1 day\'::interval into d;
END LOOP;
return null;
end;
'
LANGUAGE 'plpgsql'
;
select * from alldates('2004-07-01','2004-08-10');
---------- Original Message -----------
From: Aaron Bingham <bingham@cenix-bioscience.com>
To: pgsql-sql@postgresql.org
Sent: Wed, 13 Jul 2005 11:13:06 +0200
Subject: [SQL] Generating a range of integers in a query
> Hello,
>
> I've got an interesting problem: I need to select all possible values
> of an attribute that do /not/ occur in the database.
>
> This would be easy (in my case at least) if there were a way to
> generate a table containing all integers between 1 and n, where n is
> the result of a subquery. In my case, n will be at most a few
> hundred. I would like to be able to generate this table as a
> subquery. Any ideas?
>
> Thanks,
>
> --
> --------------------------------------------------------------------
> Aaron Bingham
> Senior Software Engineer
> Cenix BioScience GmbH
> --------------------------------------------------------------------
>
> ---------------------------(end of broadcast)---------------------------
> TIP 3: Have you checked our extensive FAQ?
>
> http://www.postgresql.org/docs/faq------- End of Original Message -------
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: jim@contactbda.com, bingham@cenix-bioscience.com
Subject: Re: Generating a range of integers in a query
In-Reply-To: <20050713132129.M45696@contactbda.com>
* 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