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	<title>SQL Server Performance &#187; range queries</title>
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		<title>Improving 2D Range Query Performance in SQL Server</title>
		<link>http://www.sql-server-performance.com/2010/2d-range-query/</link>
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		<pubDate>Tue, 07 Dec 2010 01:12:50 +0000</pubDate>
		<dc:creator>Michael Asher</dc:creator>
				<category><![CDATA[Performance Tuning]]></category>
		<category><![CDATA[DateStart]]></category>
		<category><![CDATA[geospatial data]]></category>
		<category><![CDATA[independent columns]]></category>
		<category><![CDATA[Query]]></category>
		<category><![CDATA[range]]></category>
		<category><![CDATA[range queries]]></category>
		<category><![CDATA[Range Query]]></category>
		<category><![CDATA[taking a closer look]]></category>
		<category><![CDATA[WHERE]]></category>
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		<description><![CDATA[When using the BETWEEN operator on multiple columns, you are likely using a 2D range query.&#160; Such queries perform very poorly in SQL Server.&#160;&#160; This article will tell you how you can often use additional information to rewrite such queries for much better performance.&#160; We&#8217;ll conclude by rewriting an actual BETWEEN query in a manner [...]]]></description>
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