Re: Formulating an sql query with CTID - Mailing list pgsql-hackers

From Tzahi Fadida
Subject Re: Formulating an sql query with CTID
Date
Msg-id 200607291337.45131.Tzahi.ML@gmail.com
Whole thread Raw
In response to Formulating an sql query with CTID  (Tzahi Fadida <Tzahi.ML@gmail.com>)
Responses Re: Formulating an sql query with CTID  (Martijn van Oosterhout <kleptog@svana.org>)
List pgsql-hackers
10x,
Found my answer thanks to Ragnar.
SELECT DISTINCT ON (a0,a1) a0,a1,ctid FROM t1

To tell the truth, i did not know there was an ON option in SQL.
This thing is very handy.

On Saturday 29 July 2006 03:37, Tzahi Fadida wrote:
> Hi,
> I have a query i am having trouble to formulate:
> I used to do:
> SELECT DISTINCT a0,a1 FROM public.t1
> However, now i need to add the CTID attribute, but CTID is unique
> thus, distinct is useless. In addition, i can't seem to be able to use
> max() etc... or casting to anything on CTID in order to use group by
> technique.
>
> What are my options?
>
> (I am using 8.2 or 8.1)

--
Regards,
        Tzahi.
--
Tzahi Fadida
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