Search Postgresql Archives

Re: Generate a dynamic sequence within a query

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Oct 20, 2010 at 6:22 PM, David Kerr <dmk@xxxxxxxxxxxxxx> wrote:
> I know I've seen posts on how to do this, but i can't seem to find them.
>
> I've got a data set
>
> A, B
> A, C
> A, D
> [...]
>
> and so on
>
> and i'd like to be able to wite a query that would result in
>
> 1,A,B
> 2,A,C
> 3,A,D
> [...]
>
> PG version is 8.3.

If you can upgrade to 8.4, you could use the row_number() window
function which is perfectly suited to this task, should be as simple
as:

SELECT row_number() OVER (), * FROM tablename;

-- 
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux