From: | Daryl Richter <daryl(at)brandywine(dot)com> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: ORDER records based on parameters in IN clause |
Date: | 2005-06-30 11:58:39 |
Message-ID: | 42C3DE6F.9080105@brandywine.com |
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Thread: | |
Lists: | pgsql-sql |
M.D.G. Lange wrote:
> Another option would be:
>
> SELECT * FROM table WHERE id=2003 OR id=1342 OR id=799 OR id=1450;
>
> This should give you the results in the right order...
>
Per the SQL Standard, the rows of a table have no ordering. The result
of a SELECT is just a derived table. Assuming a row order is *always* a
bug.
If you want an explicit row order you *must* use an ORDER BY clause.
I would also recommend to you a saying that I learned many years ago,
"Filter on the server, sort on the client."
> - Michiel
>
> Scott Marlowe wrote:
>
>> On Wed, 2005-06-29 at 09:22, Russell Simpkins wrote:
>>
>>
>>> fair enough. but a simple order by id would never work.
>>>
>>>
>>
>>
>> Try this:
>>
>> select *,
>> case when id=2003 then 1 when id=1342 then 2
>> when id=799 then 3 when id=1450 then 4 end as ob
>> from tablename where id in (2003,1342,799,1450) order by ob;
>>
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>>
>>
>>
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--
Daryl Richter
Platform Author & Director of Technology
v: 610.361.1000 x202
(( Brandywine Asset Management )
( "Expanding the Science of Global Investing" )
( http://www.brandywine.com ))
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