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	<title>The Pythian Blog &#187; date dimension</title>
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		<title>Date Dimension vs. Function-Based Indexes: Is the Date Dimension Still Relevant?</title>
		<link>http://www.pythian.com/news/1032/date-dimension-vs-function-based-indexes-is-the-date-dimension-still-relevant/</link>
		<comments>http://www.pythian.com/news/1032/date-dimension-vs-function-based-indexes-is-the-date-dimension-still-relevant/#comments</comments>
		<pubDate>Tue, 03 Jun 2008 16:56:14 +0000</pubDate>
		<dc:creator>Robert Hamel</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[data warehousing]]></category>
		<category><![CDATA[date dimension]]></category>

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		<description><![CDATA[The purpose of this post is to verify if a date dimension is better in regards to performance and functionality than a series of function-based indexes on a date column in the fact table. The following is the date dimension and fact table used for the testing: Date Dimension create table date_dimension( date_id number, --1..x [...]]]></description>
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