Hi Emiel:
On Wed, Jun 8, 2016 at 1:31 PM, Emiel Hermsen <s32191234@gmail.com> wrote:
> Understood. I did test the order by (a+b)+c with the statement: SELECT *
> FROM films ORDER BY 1+1; which does not sort on the second column. Therefore
> I assume that any construction like (a+b)+c will not work either.
mmm, aybe you misnterpreted your test result, order by 1+1 correctly
sorts by the expresion 1+1, = 2, so no sorting ( something that
happens on underspecified sort criteria ). So a+b+c or othres should
work too, as proven by 1+1. The problem is you thought 1+ select a
column where only naked names and single numbers do. I think even '+1'
does not do the same as '1'.
> I do agree on your last statement about the difficulty.
> My opinion in this matter is mostly based of my findings regarding the
> "ORDER BY 1+1" not doing anything.
As before, it is doing a thing, sorting by a constant.
Francisco Olarte.
