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	<title>Andrew Rollins &#187; MySQL</title>
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		<title>MySQL Join Performance</title>
		<link>http://www.andrewrollins.com/2009/06/21/mysql-join-performance/</link>
		<comments>http://www.andrewrollins.com/2009/06/21/mysql-join-performance/#comments</comments>
		<pubDate>Sun, 21 Jun 2009 16:14:45 +0000</pubDate>
		<dc:creator>Andrew</dc:creator>
				<category><![CDATA[Databases]]></category>
		<category><![CDATA[MySQL]]></category>
		<category><![CDATA[Ruby]]></category>

		<guid isPermaLink="false">http://www.andrewrollins.com/?p=200</guid>
		<description><![CDATA[Earlier this week I was curious about the performance of JOINs in MySQL. How severe is the performance hit of joins? How much slower is a string join over an integer join? I decided to do some tests, and I’m going to share my results here. I did these tests on a computer with the [...]]]></description>
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