From: | "Daniel Cristian Cruz" <danielcristian(at)gmail(dot)com> |
---|---|
To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: BUG #4037: Manual bug: 2.5. Querying a Table |
Date: | 2008-03-15 18:34:54 |
Message-ID: | 48d0cacb0803151134y116abacbv5e7722661e9b80e8@mail.gmail.com |
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Lists: | pgsql-bugs |
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(at)sss(dot)pgh(dot)pa(dot)us>:
>
> "Daniel Cristian Cruz" <danielcristian(at)gmail(dot)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
クルズ クリスチアン ダニエル
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