Re: Generate a dynamic sequence within a query

On Wed, Oct 20, 2010 at 6:22 PM, David Kerr  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;