Re: Question about clustering multiple columns
От
Bruno Wolff III
Тема
Re: Question about clustering multiple columns
Дата
Msg-id
20060616153132.GA9056@wolff.to
Ответ на
Question about clustering multiple columns (Benjamin Arai)
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Дерево обсуждения
Question about clustering multiple columns "Benjamin Arai" <benjamin@araisoft.com>
Re: Question about clustering multiple columns Bruno Wolff III <bruno@wolff.to>
On Tue, Jun 13, 2006 at 09:04:15 -0700, Benjamin Arai wrote: > Hi, > > I have a database where there are three columns (name,date,data). The > queries are almost always something like SELECT date,data FROM table WHERE > name=blah AND date > 1/1/2005 AND date < 1/1/2006;. I currently have three > B-tree indexes, one for each of the columns. Is clustering on date index > going to be what I want, or do I need a index that contains both name and > date? I would expect that clustering on the name would be better for the above query. You probably want an index on name and date combined.
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