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From: Gary Stainburn <gary.stainburn@ringways.co.uk>
Organization: Ringways Garages Ltd
To: pgsql-sql@postgresql.org
Subject: Re: order by question
Date: Wed, 9 Mar 2005 14:06:11 +0000
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	<422EF4D2.4050103@archonet.com>
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On Wednesday 09 March 2005 1:06 pm, you wrote:
> Gary Stainburn wrote:
> > Hi folks.
> >
> > I seem to remember somewhere being shown how to bump specific rows
> > to the top of a list; something along the lines of:
> >
> > select c_id as key, c_des as value from customers order by c_id =
> > 7, c_id = 160, value;
>
> Looks roughly right.
>
> SELECT * FROM foo ORDER BY not(a=6),not(a=4),a;
>   a |  b   |  c
> ---+------+-----
>   6 | ccc  | BBB
>   4 | aaa  | BBB
>   1 | aaa  | AAA
>   2 | zxxx | AAA
>   3 | ccc  | ZZZ
>   5 | zxxx | BBB
> (6 rows)
>
> Alternatively: (a<>6),(a<>4),a

Although this does exactly what I want, at first glance it should do 
exactly the oposite.

I'm guessing that for each line it evaluates
not (a=6) 0 for true else 1
not (a=4) 0 for true else 1
everything else
-- 
Gary Stainburn
 
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