Re: sum of agreggates in one SELECT?
От | John McKown |
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Тема | Re: sum of agreggates in one SELECT? |
Дата | |
Msg-id | Pine.LNX.4.21.0009191308300.20327-100000@linux2.johnmckown.net обсуждение исходный текст |
Ответ на | sum of agreggates in one SELECT? (Louis-David Mitterrand <cunctator@apartia.ch>) |
Ответы |
Re: sum of agreggates in one SELECT?
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Список | pgsql-sql |
Well, it's not a single SELECT, but why not use something like: SELECT MAX(b.lot) AS quanity, max(p.price) AS price, p.login INTO TEMPORARY TABLE temp1 FROM bid b, person p WHERE b.auction_id=84 AND p.id=b.person_id GROUP BY p.login ORDER BY max(price); SELECT SUM(quanity) from temp1; If you need the output from the original SELECT then you can print it by simply doing: SELECT * FROM temp1; Hope this is of some use to you, John On Tue, 19 Sep 2000, Louis-David Mitterrand wrote: > Hello, > > I have the following query/result: > > auction=# select max(b.lot) as quantity,max(b.price) as price,p.login from bid b, person p where b.auction_id = 84 and p.id = b.person_id group by p.login order by max(price); > quantity | price | login > ----------+-------+----------- > 1 | 5000 | papy > 12 | 5750 | cunctator > 8 | 6000 | vindex > (3 rows) > > Now I would like to sum() all results from the quantity column and > return it with one SELECT statement. Is that possible? > > I am trying: > > auction=# select sum(b.lot) from bid b, person p where b.auction_id = 84 and p.id = b.person_id ; > sum > ----- > 52 > (1 row) > > But this is wrong because it sums all quantities. I don't know how to > apply a valid WHERE clause in that case. > > Thanks in advance for any help, cheers, > > >
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