Re: MEDIAN as custom aggregate?
От | Josh Berkus |
---|---|
Тема | Re: MEDIAN as custom aggregate? |
Дата | |
Msg-id | web-148453@davinci.ethosmedia.com обсуждение исходный текст |
Ответ на | Re: MEDIAN as custom aggregate? (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-sql |
Tom, > Um ... does that work? I thought LIMIT was fairly restrictive about > what it would take as a parameter --- like, constants or $n > parameters > only. > > I do not know of any median-finding algorithm that doesn't require a > depressingly large amount of storage... Me neither. You're right; the query didn't work. Here's a link to the median-finding function I posted to the CookBook: http://www.brasileiro.net/postgres/cookbook/view-one-recipe.adp?recipe_id=1654 Anyone who can improve it is welcome! -Josh ______AGLIO DATABASE SOLUTIONS___________________________ Josh Berkus Complete informationtechnology josh@agliodbs.com and data management solutions (415) 565-7293 for law firms, small businesses fax 621-2533 and non-profit organizations. San Francisco
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