Re: Aggregates with NaN values
От | Mark Roberts |
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Тема | Re: Aggregates with NaN values |
Дата | |
Msg-id | 1228503076.27464.3.camel@localhost обсуждение исходный текст |
Ответ на | Aggregates with NaN values ("Sean Davis" <sdavis2@mail.nih.gov>) |
Ответы |
Re: Aggregates with NaN values
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Список | pgsql-sql |
On Thu, 2008-12-04 at 13:01 -0500, Sean Davis wrote: > I am happy to see NaN and infinity handled in input. I would now like > to compute aggregates (avg, min, max, etc) on columns with NaN values > in them. The standard behavior (it appears) is to have the aggregate > return NaN if the data contain one-or-more NaN values. I am used to > using coalesce with NULL values, but that doesn't work with NaN. I > can deal with these using CASE statuement to assign a value, but is > there a standard way of dealing with the NaN (or Infinity, for that > matter) cases to get a behvavior where they are "ignored" by an > aggregate? > > Thanks, > Sean > Have you considered using a where clause? -Mark
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