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	<title>碧海蓝天 &#187; 分页</title>
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	<description>Oracle DataBase Linux Software</description>
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		<title>分页问题</title>
		<link>http://wajoynece.cn/2009/06/pagerownum/</link>
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		<pubDate>Thu, 18 Jun 2009 09:09:02 +0000</pubDate>
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				<category><![CDATA[Oracle]]></category>
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		<guid isPermaLink="false">http://wajoynece.cn/?p=76</guid>
		<description><![CDATA[表T 索引T(id) select * from (select * from t order by id desc) where rownum]]></description>
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索引T(id)<br />
select * from (select * from t order by id desc) where rownum<=10;<br />
搜集统计信息，不走索引；<br />
用hint，不走索引；<br />
在zh提醒下，终于想起来是not null约束搞鬼，以前也遇到过，笨死。</p>
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