Humm...
Reading this way... It sounds like I could write something like this:
SELECT city, (temp_hi+temp_lo)/2 temp_avg, date FROM weather;
Like it work with tables...
2008/3/14, Tom Lane <tgl@sss.pgh.pa.us>:
>
> "Daniel Cristian Cruz" <danielcristian@gmail.com> writes:
> > Where it says:
>
> > "Notice how the AS clause is used to relabel the output column. (The AS
> > clause is optional.)"
>
> > It's wrong, because it causes an error if executed without it.
>
> Hmm? You can leave off the AS clause if you want:
>
> SELECT city, (temp_hi+temp_lo)/2 AS temp_avg, date FROM weather;
> SELECT city, (temp_hi+temp_lo)/2, date FROM weather;
>
> regards, tom lane
>
--
Daniel Cristian Cruz
$B%/%k%:(B $B%/%j%9%A%"%s(B $B%@%K%(%k(B