From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Weiping He <laser(at)zhengmai(dot)com(dot)cn> |
Cc: | pgsql-docs(at)postgresql(dot)org |
Subject: | Re: doc question about column name alias |
Date: | 2001-06-25 15:06:19 |
Message-ID: | 200106251506.f5PF6J905523@candle.pha.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-docs |
> Hi,
> I'm translating 7.1.2's doc to Chinese, and got one question while
> doing these,
> in queries.sgml line 795:
>
> SELECT a AS b FROM table1 ORDER BY a;
>
> I think it should be:
>
> SELECT a AS b FROM table1 ORDER BY b;
>
> but from the context:" References to column names in the FROM clause
> that are renamed in the select list are also allowed:"
> it seems the original is correct. Am I misunderstood? How the SQL
> standard saids?
> Thanks.
Both work:
test=> select relname as x from pg_class order by relname;
and
test=> select relname as x from pg_class order by x;
I am not sure which is more standards-compliant.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
From | Date | Subject | |
---|---|---|---|
Next Message | Tom Lane | 2001-06-25 15:35:54 | Re: doc question about column name alias |
Previous Message | Weiping He | 2001-06-25 14:38:46 | doc question about column name alias |