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	<title>Technical LeoLo &#187; duplicate</title>
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	<description>My Learning note</description>
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		<title>在Oracle中找出重複的紀錄的方法</title>
		<link>http://blog.leolo.cc/2008/05/06/15/</link>
		<comments>http://blog.leolo.cc/2008/05/06/15/#comments</comments>
		<pubDate>Tue, 06 May 2008 06:38:00 +0000</pubDate>
		<dc:creator>leolo</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[duplicate]]></category>
		<category><![CDATA[PLSQL]]></category>

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		<description><![CDATA[在Oracle中找出重複的紀錄的方法SELECT aid FROM atable GROUP BY aid HAVING COUNT(*) &#62;1;
刪除重複的記錄DELETE FROM atable a where a.ROWID!=(SELECT MAX(ROWID) FROM atable b WHERE a.aid=b.aid;
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