�??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#20122;&#27954;&#19968;&#21306;&#20108;&#21306;&#19977;&#21306;&#20599;&#25293;&#22899;&#21397;&#44;&#20122;&#27954;&#97;&#118;&#26080;&#30721;&#19987;&#21306;&#20122;&#27954;&#97;&#118;&#19981;&#21345;&#44;&#20037;&#28909;&#32508;&#21512;&#22312;&#32447;&#20122;&#27954;&#31934;&#21697;</title><link>http://www.tkk7.com/decode360/category/40026.html</link><description>业精于勤而荒于嬉    QQ:150355677    MSN:decode360@hotmail.com</description><language>zh-cn</language><lastBuildDate>Wed, 26 Aug 2009 15:47:06 GMT</lastBuildDate><pubDate>Wed, 26 Aug 2009 15:47:06 GMT</pubDate><ttl>60</ttl><item><title>一�D�很�l�的SQL(双重否定)</title><link>http://www.tkk7.com/decode360/archive/2009/06/12/282804.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Fri, 12 Jun 2009 13:36:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/06/12/282804.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/282804.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/06/12/282804.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/282804.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/282804.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 前段旉���看到一�D�SQL�Q�感觉实现的逻辑非常�l�，而且看了(ji��n)之后想了(ji��n)很久都没有想明白到底是怎么回事�Q�再一直想到我都能��C���q�段SQL的具体细节了(ji��n)�Q�放到博客上研究一下�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/06/12/282804.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/282804.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-06-12 21:36 <a href="http://www.tkk7.com/decode360/archive/2009/06/12/282804.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>SQLPlus中的COPY指��o(h��)学习(f��n)</title><link>http://www.tkk7.com/decode360/archive/2009/05/23/292670.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Sat, 23 May 2009 15:10:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/05/23/292670.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/292670.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/05/23/292670.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/292670.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/292670.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最�q�看同事操作数据库，用到�?ji��n)copy命��o(h��)�Q�惊叹自�׃��前竟然不知道。赶紧看�?ji��n)一下，虽然�q�么命��o(h��)很简单，但是���实是很有用�?<br>&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/05/23/292670.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/292670.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-05-23 23:10 <a href="http://www.tkk7.com/decode360/archive/2009/05/23/292670.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>关于Views的Updatable问题</title><link>http://www.tkk7.com/decode360/archive/2009/04/10/292662.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Fri, 10 Apr 2009 13:01:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/04/10/292662.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/292662.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/04/10/292662.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/292662.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/292662.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天在操作视囄���时候发生了(ji��n)一个错误：(x��)ORA-01732: data manipulation operation not legal on this view 其实视图的更新是有很多的限制的，例如不能有聚合函数、分析函数、排序函数等�{�，而且如果两个表关联后的视图，则只能更新第一个表的字�D늭��{�。具体的说明可以在《SQL Reference》里扑ֈ��Q�如下：(x��)
<br>&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/04/10/292662.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/292662.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-04-10 21:01 <a href="http://www.tkk7.com/decode360/archive/2009/04/10/292662.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Update的另一�U�写�?/title><link>http://www.tkk7.com/decode360/archive/2009/04/06/292660.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Mon, 06 Apr 2009 13:51:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/04/06/292660.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/292660.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/04/06/292660.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/292660.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/292660.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最�q�学到update的另一�U�写法，是以前自�׃��来没有��用过的，看了(ji��n)一下文���，也没有找到很详细的说明。这�U�update方式其基���是徏立在Query中的�Q�所以可以确保��用CBO而非RBO�Q�可以在大表的更新时明显得提高效率。在�q�里记录一下基本的�Ҏ(gu��)���Q?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/04/06/292660.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/292660.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-04-06 21:51 <a href="http://www.tkk7.com/decode360/archive/2009/04/06/292660.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>两段好玩的SQL[AskTom]</title><link>http://www.tkk7.com/decode360/archive/2009/04/04/292031.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Sat, 04 Apr 2009 14:43:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/04/04/292031.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/292031.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/04/04/292031.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/292031.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/292031.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Tom的下面两�D�SQL都写得比较好玩，没有用到很复杂的函数�Q�主要是思�\很受益。第一�D�SQL的题目比较新奇，以前没遇到过�q�样的情况，Tom的答案也比较规整�Q�基本就是自己创��Z��个标志位�Q�然后在外层向左推进一位，当然用PLSQL肯定可以有更加便��L(f��ng)���Ҏ(gu��)��。第二段SQL主要是中间的那句的思�\�Q�换我的话估计就是sum()over()之后再sign+decode�?ji��n)，用least+greatest真的比较�_�ֽ�的逻辑�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/04/04/292031.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/292031.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-04-04 22:43 <a href="http://www.tkk7.com/decode360/archive/2009/04/04/292031.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>关于Break On [SQLPlus]</title><link>http://www.tkk7.com/decode360/archive/2009/04/03/292046.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Fri, 03 Apr 2009 15:05:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/04/03/292046.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/292046.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/04/03/292046.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/292046.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/292046.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天�l�箋来学�?f��n)一下SQLPLUS中的Report函数。这个在工作中��用到的机�?x��)不多，但是做好之后把结果打印出来看着�?x��)很爽�?<br>参考文档：(x��)《SQL*Plus User's Guide and Reference Release 10.2 B14357-01�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/04/03/292046.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/292046.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-04-03 23:05 <a href="http://www.tkk7.com/decode360/archive/2009/04/03/292046.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>ratio_to_report函数</title><link>http://www.tkk7.com/decode360/archive/2009/04/02/292044.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Thu, 02 Apr 2009 13:56:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/04/02/292044.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/292044.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/04/02/292044.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/292044.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/292044.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 学习(f��n)一下ratio_to_report函数�Q�这个函��C��天才遇到�Q�以前都没有注意。主要是用来�q�行比例的统计的�Q�也���是一个基���的统计函敎ͼ�格式也没有什么特别的�Q�只在这里做一个简单的记录�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/04/02/292044.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/292044.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-04-02 21:56 <a href="http://www.tkk7.com/decode360/archive/2009/04/02/292044.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>关于MERGE操作的一些徏�?/title><link>http://www.tkk7.com/decode360/archive/2009/04/01/292043.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Wed, 01 Apr 2009 13:23:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/04/01/292043.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/292043.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/04/01/292043.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/292043.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/292043.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Oracle可以���Update和Insert操作合�ƈ��Z��个MERGE操作。第一可以更加方便操作、简化逻辑�Q�第二在Oracle的内部进行了(ji��n)效率的优化�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/04/01/292043.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/292043.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-04-01 21:23 <a href="http://www.tkk7.com/decode360/archive/2009/04/01/292043.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>SQLPlus { sqlterminator | escape }</title><link>http://www.tkk7.com/decode360/archive/2009/03/30/291832.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Mon, 30 Mar 2009 13:54:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/03/30/291832.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/291832.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/03/30/291832.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/291832.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/291832.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天来学�?f��n)两个SQLPlus中的参数�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/03/30/291832.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/291832.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-03-30 21:54 <a href="http://www.tkk7.com/decode360/archive/2009/03/30/291832.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Oracle的�{义字�W?/title><link>http://www.tkk7.com/decode360/archive/2009/03/27/291831.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Fri, 27 Mar 2009 12:51:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/03/27/291831.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/291831.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/03/27/291831.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/291831.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/291831.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 对于Oracle的�{义字�W�，对然�?ji��n)解�Q�但是一直不是很明白。而且在SQLPlus下的ESCAPE�q�和函数ESCAPE不是一个意思，更加�Ҏ(gu��)��搞�؜�Q�所以专门来学习(f��n)一下。首先可以通过几个���单的例子来了(ji��n)解一下这个函数在SQL中的用法�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/03/27/291831.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/291831.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-03-27 20:51 <a href="http://www.tkk7.com/decode360/archive/2009/03/27/291831.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>���单SQL技巧一�?/title><link>http://www.tkk7.com/decode360/archive/2009/03/21/291844.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Sat, 21 Mar 2009 11:51:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/03/21/291844.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/291844.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/03/21/291844.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/291844.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/291844.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天的文跟昨天一��P��也是在《SQL.Puzzles》上的一个章节。虽焉���是一些简单的SQL处理�Q�但是大致翻�?ji��n)一下，�q�本书的有些例子�q�是相当有趣的，如果以后没事���慢慢读一读，不过最�q�比较忙�?ji��n)，���随手记一下吧�Q�以后就�{�有看着��眼的SQL再�{�?ji��n)�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/03/21/291844.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/291844.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-03-21 19:51 <a href="http://www.tkk7.com/decode360/archive/2009/03/21/291844.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Constraints讄����l�习(f��n)</title><link>http://www.tkk7.com/decode360/archive/2009/03/20/291843.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Fri, 20 Mar 2009 13:21:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/03/20/291843.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/291843.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/03/20/291843.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/291843.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/291843.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 对于报表的创建来��_(d��)��隄���无非有这样几个：(x��)1、考虑是否需要分区、徏���等�Q?、设�|�表的存储空间参敎ͼ�3、设�|�完整性约束。其中第1�?点一般都针对大型的数据库�Q�而第3�Ҏ(gu��)��最常用到的。所以最�q�学�?f��n)一下如何��用constraints来实��C��些约束，直接在源头杜�l�数据错误�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/03/20/291843.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/291843.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-03-20 21:21 <a href="http://www.tkk7.com/decode360/archive/2009/03/20/291843.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>关于login.sql</title><link>http://www.tkk7.com/decode360/archive/2009/03/11/291821.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Wed, 11 Mar 2009 15:49:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/03/11/291821.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/291821.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/03/11/291821.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/291821.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/291821.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最�q�遇��C��个问题，在sqlplus首次��d���Ӟ���?x��)调用login.sql�Q�显�C�指定的SQLPROMPT�Q�但是当再次使用connect命��o(h��)�q�接其他用户�Ӟ��昄���的SQLPROMPT一直无法改变，而且重新connect之后所有在login.sql中设�|�的属性也全部丢失。找�?ji��n)很久原因之后才发现原来是因为Oracle的版本问题，9i中只能在初次��d��sqlplus时才�?x��)去调用login.sql�Q�而在10g之后�Q�每�ơconnect都会(x��)调用该脚本�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/03/11/291821.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/291821.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-03-11 23:49 <a href="http://www.tkk7.com/decode360/archive/2009/03/11/291821.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>取重复记录中的�Q一条的分析</title><link>http://www.tkk7.com/decode360/archive/2009/03/04/291828.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Wed, 04 Mar 2009 13:57:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/03/04/291828.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/291828.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/03/04/291828.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/291828.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/291828.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最�q�一直考虑一个问题，扑և�表中同一字段重复记录中的��L��一条，照理来说�q�样的一个需求，在Oracle内部�q�行实现是很方便的，而且不需要对表进�?遍的扫描。但是事实上我想�?ji��n)很久也向不出来有什么函数可以直接实现这一功能�Q�基本上所有可以这样做的方法都需要进行嵌套才能完成。不知道��Z��么Oracle没有提供�q�个功能�Q�也许是有什么逻辑矛盾我没有想到。现在�ȝ��一下，模拟的环境如下：(x��)&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/03/04/291828.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/291828.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-03-04 21:57 <a href="http://www.tkk7.com/decode360/archive/2009/03/04/291828.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>SQL Hint优化�Ҏ(gu��)��30例[转]</title><link>http://www.tkk7.com/decode360/archive/2009/02/15/289863.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Sun, 15 Feb 2009 12:48:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/02/15/289863.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/289863.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/02/15/289863.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/289863.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/289863.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在SQL语句优化�q�程中，我们�l�常�?x��)用到hint,现�ȝ��一下在SQL优化�q�程中常见Oracle Hint的用法：(x��)
<br>&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/02/15/289863.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/289863.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-02-15 20:48 <a href="http://www.tkk7.com/decode360/archive/2009/02/15/289863.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>min/max函数的index问题</title><link>http://www.tkk7.com/decode360/archive/2009/01/27/289049.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Tue, 27 Jan 2009 13:38:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/01/27/289049.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/289049.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/01/27/289049.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/289049.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/289049.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在查询某表时同时使用�?ji��n)min和max函数,�l�果查询很慢�Q�但是单独执行min或者max旉���度很快�Q�徏个环境模拟一�?&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/01/27/289049.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/289049.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-01-27 21:38 <a href="http://www.tkk7.com/decode360/archive/2009/01/27/289049.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Update时不走烦(ch��)引的问题</title><link>http://www.tkk7.com/decode360/archive/2009/01/26/289048.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Mon, 26 Jan 2009 10:16:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2009/01/26/289048.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/289048.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2009/01/26/289048.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/289048.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/289048.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天工作上遇��C��(ji��n)一个问题，一个好几万数据的大表update数据时不走烦(ch��)引，旉���长到无法忍受。徏一个环境模拟一下：(x��)&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2009/01/26/289048.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/289048.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2009-01-26 18:16 <a href="http://www.tkk7.com/decode360/archive/2009/01/26/289048.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>sqlplus的小�U�密[转]</title><link>http://www.tkk7.com/decode360/archive/2008/12/30/288938.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Tue, 30 Dec 2008 12:01:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/12/30/288938.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/288938.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/12/30/288938.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/288938.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/288938.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天看到一个帖子，学了(ji��n)几个SQLPLUS的小技巧。说实话�q�挺不错的，���实没有花时间看�q�Oracle关于SQLPLUS的文档，总觉得有�Ҏ(gu��)���Ҏ(gu��)����_(d��)��呵呵�Q�不�q�这��L(f��ng)��识就永远掌握得不牢靠�Q�忘��C��(ji��n)要去查，不过要能抽出旉���看这�U�文���，估计要等1-2�q�之后了(ji��n)�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/12/30/288938.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/288938.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-12-30 20:01 <a href="http://www.tkk7.com/decode360/archive/2008/12/30/288938.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>10G中正则表辑ּ�的应�?/title><link>http://www.tkk7.com/decode360/archive/2008/12/29/289043.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Mon, 29 Dec 2008 13:17:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/12/29/289043.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/289043.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/12/29/289043.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/289043.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/289043.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在ITPUB上看��C��帖子�Q�计���四则运���的�Q�顺便来学习(f��n)一�?0g里的正则表达式。原帖地址�Q�http://www.itpub.net/viewthread.php?tid=1051167&extra=page%3D1%26amp%3Bfilter%3Ddigest&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/12/29/289043.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/289043.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-12-29 21:17 <a href="http://www.tkk7.com/decode360/archive/2008/12/29/289043.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>用SQL计算100以内的质数[转]</title><link>http://www.tkk7.com/decode360/archive/2008/12/27/289041.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Sat, 27 Dec 2008 13:31:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/12/27/289041.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/289041.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/12/27/289041.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/289041.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/289041.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 蛮有意思的一�D�SQL�Q�拿来看一下�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/12/27/289041.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/289041.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-12-27 21:31 <a href="http://www.tkk7.com/decode360/archive/2008/12/27/289041.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>SQL Plus基础命��o(h��)学习(f��n)�W�记</title><link>http://www.tkk7.com/decode360/archive/2008/11/30/286844.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Sun, 30 Nov 2008 12:29:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/11/30/286844.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/286844.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/11/30/286844.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/286844.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/286844.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 依旧是我当年学习(f��n)的笔��C��一�Q�这是在学习(f��n)SQL Plus时记的。其实在SQL Plus下是有很多其他地方不能��用的功能和技巧的�Q�不�q�这边只是一个基本的应用�Q�不涉及(qi��ng)一些复杂的东西。好�Q�下面看一下内容：(x��)&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/11/30/286844.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/286844.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-11-30 20:29 <a href="http://www.tkk7.com/decode360/archive/2008/11/30/286844.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>SQL基本函数学习(f��n)�W�记</title><link>http://www.tkk7.com/decode360/archive/2008/11/29/286840.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Sat, 29 Nov 2008 12:46:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/11/29/286840.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/286840.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/11/29/286840.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/286840.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/286840.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: �q�是我很久以前刚开始学�?f��n)SQL时作的笔讎ͼ�今天���资料的时候被我翻�?ji��n)出来，觉得攑֜�那里以后遗失掉�?ji��n)也是可惜�Q�不如放到博客上�Q�以后也可以看看�Q�还可以帮助一些刚开始学�?f��n)SQL的朋友入个门。不�q�都是按我自��q��掌握�E�度来记的，估计也不太适合别�h�Q�就随便看看吧�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/11/29/286840.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/286840.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-11-29 20:46 <a href="http://www.tkk7.com/decode360/archive/2008/11/29/286840.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>打印五环和五角星的SQL代码</title><link>http://www.tkk7.com/decode360/archive/2008/11/01/286839.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Sat, 01 Nov 2008 11:47:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/11/01/286839.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/286839.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/11/01/286839.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/286839.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/286839.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 大牛写的�q�两�D�SQL实在是太销��了(ji��n)�Q�实在是忍不住要转蝲�q�来�Q�留着以后慢慢看，太牛�?ji��n)…�?http://www.itpub.net/viewthread.php?tid=981654&extra=&page=1&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/11/01/286839.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/286839.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-11-01 19:47 <a href="http://www.tkk7.com/decode360/archive/2008/11/01/286839.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Varchar2 &amp;amp; Number 的长�?/title><link>http://www.tkk7.com/decode360/archive/2008/10/30/286830.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Thu, 30 Oct 2008 11:32:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/10/30/286830.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/286830.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/10/30/286830.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/286830.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/286830.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最�q�碰��C��(ji��n)varchar2和number的限刉���题，所以专门去查询�?ji��n)Oracle中对varchar2和number最大值的说明�Q�一查还真发��C��前了(ji��n)解的很少。所以专门记载下来，以备今后忘记的时候查询之用�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/10/30/286830.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/286830.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-10-30 19:32 <a href="http://www.tkk7.com/decode360/archive/2008/10/30/286830.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>���数点前�?的显�C�问�?/title><link>http://www.tkk7.com/decode360/archive/2008/10/29/286824.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Wed, 29 Oct 2008 13:12:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/10/29/286824.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/286824.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/10/29/286824.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/286824.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/286824.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在处理数据时发现一个问题，Oracle对于���于1的小敎ͼ����数点前面的0是不昄���的。这个问题遇到的很普遍，解决的方法也挺多的。大致上研究�?ji��n)一下这个问题，提供�?ji��n)用to_char和decode函数来解册���个问题的两种�Ҏ(gu��)��。先来看一下这个问题：(x��)&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/10/29/286824.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/286824.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-10-29 21:12 <a href="http://www.tkk7.com/decode360/archive/2008/10/29/286824.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>MERGE函数用法</title><link>http://www.tkk7.com/decode360/archive/2008/10/23/286822.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Thu, 23 Oct 2008 11:51:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/10/23/286822.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/286822.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/10/23/286822.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/286822.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/286822.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在PLSQL中操作数据�{化过�E�中�l�常�?x��)用到MERGE语句�Q�MERGE函数是Oracle9i新增的函敎ͼ�基本上就是等于update和insert两个函数的相加。��用MERGE函数�Q�通过判断两个表之间某字段的关联情况，如果兌���匚w��上的话就�q�行update操作�Q�如果没有匹配就执行insert。这个函��C��来是减少�?ji��n)程序的长度�Q�而且只对表进行一�ơ全表扫描，效率也会(x��)有所提高�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/10/23/286822.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/286822.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-10-23 19:51 <a href="http://www.tkk7.com/decode360/archive/2008/10/23/286822.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>字符串分割问题[转]</title><link>http://www.tkk7.com/decode360/archive/2008/09/30/286066.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Tue, 30 Sep 2008 15:43:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/09/30/286066.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/286066.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/09/30/286066.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/286066.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/286066.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 字符串分割是一个经�怼�(x��)用到的功能，无论用什么语�a�。在Oracle里，可以解决字符串分割的�Ҏ(gu��)��有很多种�Q�如果写Function�Q�应该是可以可以写出适用性非帔R��的函数的。不�q�现在什么都���行直接用SQL来解冻I��下面转两���文章来学习(f��n)一�?nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/09/30/286066.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/286066.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-09-30 23:43 <a href="http://www.tkk7.com/decode360/archive/2008/09/30/286066.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>打印�?ji��)�?ji��)乘法�?/title><link>http://www.tkk7.com/decode360/archive/2008/09/29/286065.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Mon, 29 Sep 2008 13:22:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/09/29/286065.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/286065.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/09/29/286065.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/286065.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/286065.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: �|�上扑ֈ�的打��C��(ji��)�?ji��)乘法表的SQL�E�序�Q�关键的一些思�\�q�是很有借鉴价值的。其实几乎所有比较复杂的SQL基本上都�?x��)用到像lag、connect by、rownum、分析函数这些东西，逐渐看着看着�Q�也��׃��(f��n)惯了(ji��n)。下面分几个�c�d��介绍&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/09/29/286065.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/286065.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-09-29 21:22 <a href="http://www.tkk7.com/decode360/archive/2008/09/29/286065.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>SQL行列转换</title><link>http://www.tkk7.com/decode360/archive/2008/09/08/283584.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Mon, 08 Sep 2008 11:31:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/09/08/283584.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/283584.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/09/08/283584.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/283584.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/283584.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在数据库开发的�q�程中，行列转换是一个一定会(x��)遇到的问题，解决的方法也有很多，但是对于一些需求复杂，非常制式化的report需求，行列转换真的是要做到头大�Q�需要进行模块化的PLSQL�~�程来解冟뀂本文摘录了(ji��n)在Oracle环境下，解决单个字符的行列�{换问题的几种常用�Ҏ(gu��)���Q�具体如下：(x��)&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/09/08/283584.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/283584.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-09-08 19:31 <a href="http://www.tkk7.com/decode360/archive/2008/09/08/283584.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>获得字段数字部分 [转]</title><link>http://www.tkk7.com/decode360/archive/2008/09/06/283567.html</link><dc:creator>decode360</dc:creator><author>decode360</author><pubDate>Sat, 06 Sep 2008 11:27:00 GMT</pubDate><guid>http://www.tkk7.com/decode360/archive/2008/09/06/283567.html</guid><wfw:comment>http://www.tkk7.com/decode360/comments/283567.html</wfw:comment><comments>http://www.tkk7.com/decode360/archive/2008/09/06/283567.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/decode360/comments/commentRss/283567.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/decode360/services/trackbacks/283567.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在��^常的数据处理中，特别是数据清�z�阶�D�，要获取字�D�中数字部分往往都是�l�常�?x��)用到的要求。所以专门找�?ji��n)一下有哪几�U�方法可以实现这个功能�?0g中已�l�提供了(ji��n)正则表达式的功能�Q�所以这个事情变得方便了(ji��n)很多�Q�但是还是比较喜�Ƣ用translate函数来获取的�q�个�Ҏ(gu��)���Q�非常��y妙，�q�个是�{载的地址�Q�http://zhouwf0726.itpub.net/post/9689/191406&nbsp;&nbsp;<a href='http://www.tkk7.com/decode360/archive/2008/09/06/283567.html'>阅读全文</a><img src ="http://www.tkk7.com/decode360/aggbug/283567.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/decode360/" target="_blank">decode360</a> 2008-09-06 19:27 <a href="http://www.tkk7.com/decode360/archive/2008/09/06/283567.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>                                    <footer>
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