Re: Ordering Results by a Supplied Order

Hey,
I don"t understand the difference between this ORDINALITY option and
adding a "row_number() over()" in the SELECT.

Thanks,

Cheers,
Remi-C

2014-02-06 Vik Fearing <vik(dot)fearing(at)dalibo(dot)com>:

> On 02/06/2014 04:16 AM, Michael Sacket wrote:
>
> Often times I find it necessary to work with table rows in a specific,
> generally user-supplied order. It could be anything really that requires
> an ordering that can't come from a natural column. Most of the time this
> involved manipulating a position column from the client application. In
> any case, I've often found that to be cumbersome, but I think I've come up
> with a solution that some of you may find useful.
>
>
> Up until 9.4, that's a good way to do it.
>
> Starting from 9.4, you can use the WITH ORDINALITY feature.
> http://www.postgresql.org/docs/devel/static/sql-select.html
>
> --
> Vik
>
>