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	<title>Down Home Country Coding With Scott Selikoff and Jeanne Boyarsky &#187; nested</title>
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		<title>Memo: Avoid Nested Queries in MySQL at all costs</title>
		<link>http://www.selikoff.net/2008/12/10/memo-avoid-nested-queries-in-mysql-at-all-costs/</link>
		<comments>http://www.selikoff.net/2008/12/10/memo-avoid-nested-queries-in-mysql-at-all-costs/#comments</comments>
		<pubDate>Wed, 10 Dec 2008 15:20:52 +0000</pubDate>
		<dc:creator>Scott Selikoff</dc:creator>
				<category><![CDATA[Database]]></category>
		<category><![CDATA[JDBC]]></category>
		<category><![CDATA[mysql]]></category>
		<category><![CDATA[nested]]></category>
		<category><![CDATA[queries]]></category>

		<guid isPermaLink="false">http://www.selikoff.net/blog/?p=652</guid>
		<description><![CDATA[Some of my readers may be aware that nested subqueries such as &#8220;SELECT * FROM widgets WHERE id IN (SELECT &#8230;)&#8221;, don&#8217;t work all that well in MYSQL. While the syntax is usually correct, the performance issues in practice can be horrendous. This article delves deeper into this issue, and why MySQL performs so poorly [...]]]></description>
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