Re: olympics ranking query
| От | David Garamond |
|---|---|
| Тема | Re: olympics ranking query |
| Дата | |
| Msg-id | 412630C8.5000004@zara.6.isreserved.com обсуждение исходный текст |
| Ответ на | Re: olympics ranking query (Tom Lane <tgl@sss.pgh.pa.us>) |
| Ответы |
Re: olympics ranking query
|
| Список | pgsql-sql |
Tom Lane wrote:
>>Challenge question: is there a simpler way to do query #1 (without any
>>PL, and if possible without sequences too?
>
> Can't without sequences AFAIK, but you certainly can do it simpler:
>
> select setval('seq1', 0);
>
> select nextval('seq1'), * from
> (select count(*) as numranker,
> gold, silver, bronze
> from countrymedal
> group by gold, silver, bronze
> order by gold desc, silver desc, bronze desc) ss;
This is not quite the same. The ranks are sequential, but they skip, so
as to match the number of participating countries.
--
dave
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