﻿<?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>BlogJava-Decode360's Blog-随笔分类-05.SQL</title><link>http://www.blogjava.net/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>一段很绕的SQL(双重否定)</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/06/12/282804.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/282804.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/06/12/282804.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/282804.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/282804.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 前段时间看到一段SQL，感觉实现的逻辑非常绕，而且看了之后想了很久都没有想明白到底是怎么回事，再一直想到我都能记住这段SQL的具体细节了，放到博客上研究一下。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/06/12/282804.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/282804.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-06-12 21:36 <a href="http://www.blogjava.net/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指令学习</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/05/23/292670.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/292670.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/05/23/292670.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/292670.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/292670.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最近看同事操作数据库，用到了copy命令，惊叹自己之前竟然不知道。赶紧看了一下，虽然这么命令很简单，但是确实是很有用。<br>&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/05/23/292670.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/292670.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-05-23 23:10 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2009/04/10/292662.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/292662.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/04/10/292662.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/292662.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/292662.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天在操作视图的时候发生了一个错误：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段等等。具体的说明可以在《SQL Reference》里找到，如下：<br>&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/04/10/292662.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/292662.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-04-10 21:01 <a href="http://www.blogjava.net/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的另一种写法</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/04/06/292660.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/292660.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/04/06/292660.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/292660.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/292660.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最近学到update的另一种写法，是以前自己从来没有使用过的，看了一下文档，也没有找到很详细的说明。这种update方式其基础是建立在Query中的，所以可以确保使用CBO而非RBO，可以在大表的更新时明显得提高效率。在这里记录一下基本的方法：&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/04/06/292660.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/292660.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-04-06 21:51 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2009/04/04/292031.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/292031.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/04/04/292031.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/292031.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/292031.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Tom的下面两段SQL都写得比较好玩，没有用到很复杂的函数，主要是思路很受益。第一段SQL的题目比较新奇，以前没遇到过这样的情况，Tom的答案也比较规整，基本就是自己创建一个标志位，然后在外层向左推进一位，当然用PLSQL肯定可以有更加便捷的方法。第二段SQL主要是中间的那句的思路，换我的话估计就是sum()over()之后再sign+decode了，用least+greatest真的比较精彩的逻辑。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/04/04/292031.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/292031.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-04-04 22:43 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2009/04/03/292046.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/292046.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/04/03/292046.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/292046.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/292046.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天继续来学习一下SQLPLUS中的Report函数。这个在工作中使用到的机会不多，但是做好之后把结果打印出来看着会很爽。<br>参考文档：《SQL*Plus User's Guide and Reference Release 10.2 B14357-01》&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/04/03/292046.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/292046.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-04-03 23:05 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2009/04/02/292044.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/292044.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/04/02/292044.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/292044.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/292044.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 学习一下ratio_to_report函数，这个函数今天才遇到，以前都没有注意。主要是用来进行比例的统计的，也算是一个基础的统计函数，格式也没有什么特别的，只在这里做一个简单的记录。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/04/02/292044.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/292044.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-04-02 21:56 <a href="http://www.blogjava.net/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操作的一些建议</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/04/01/292043.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/292043.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/04/01/292043.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/292043.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/292043.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Oracle可以将Update和Insert操作合并为一个MERGE操作。第一可以更加方便操作、简化逻辑，第二在Oracle的内部进行了效率的优化。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/04/01/292043.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/292043.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-04-01 21:23 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2009/03/30/291832.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/291832.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/03/30/291832.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/291832.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/291832.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天来学习两个SQLPlus中的参数。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/03/30/291832.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/291832.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-03-30 21:54 <a href="http://www.blogjava.net/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的转义字符</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/03/27/291831.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/291831.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/03/27/291831.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/291831.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/291831.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 对于Oracle的转义字符，对然了解，但是一直不是很明白。而且在SQLPlus下的ESCAPE还和函数ESCAPE不是一个意思，更加容易搞混，所以专门来学习一下。首先可以通过几个简单的例子来了解一下这个函数在SQL中的用法。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/03/27/291831.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/291831.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-03-27 20:51 <a href="http://www.blogjava.net/decode360/archive/2009/03/27/291831.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>简单SQL技巧一例</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/03/21/291844.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/291844.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/03/21/291844.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/291844.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/291844.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天的文跟昨天一样，也是在《SQL.Puzzles》上的一个章节。虽然都是一些简单的SQL处理，但是大致翻了一下，这本书的有些例子还是相当有趣的，如果以后没事就慢慢读一读，不过最近比较忙了，就随手记一下吧，以后就等有看着顺眼的SQL再转了。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/03/21/291844.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/291844.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-03-21 19:51 <a href="http://www.blogjava.net/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设置练习</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/03/20/291843.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/291843.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/03/20/291843.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/291843.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/291843.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 对于报表的创建来说，难点无非有这样几个：1、考虑是否需要分区、建簇等；2、设置表的存储空间参数；3、设置完整性约束。其中第1、2点一般都针对大型的数据库，而第3点是最常用到的。所以最近学习一下如何使用constraints来实现一些约束，直接在源头杜绝数据错误。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/03/20/291843.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/291843.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-03-20 21:21 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2009/03/11/291821.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/291821.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/03/11/291821.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/291821.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/291821.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最近遇到一个问题，在sqlplus首次登录时，会调用login.sql，显示指定的SQLPROMPT，但是当再次使用connect命令连接其他用户时，显示的SQLPROMPT一直无法改变，而且重新connect之后所有在login.sql中设置的属性也全部丢失。找了很久原因之后才发现原来是因为Oracle的版本问题，9i中只能在初次登录sqlplus时才会去调用login.sql，而在10g之后，每次connect都会调用该脚本。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/03/11/291821.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/291821.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-03-11 23:49 <a href="http://www.blogjava.net/decode360/archive/2009/03/11/291821.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>取重复记录中的任一条的分析</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/03/04/291828.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/291828.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/03/04/291828.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/291828.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/291828.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最近一直考虑一个问题，找出表中同一字段重复记录中的任意一条，照理来说这样的一个需求，在Oracle内部进行实现是很方便的，而且不需要对表进行2遍的扫描。但是事实上我想了很久也向不出来有什么函数可以直接实现这一功能，基本上所有可以这样做的方法都需要进行嵌套才能完成。不知道为什么Oracle没有提供这个功能，也许是有什么逻辑矛盾我没有想到。现在总结一下，模拟的环境如下：&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/03/04/291828.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/291828.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-03-04 21:57 <a href="http://www.blogjava.net/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优化方法30例[转]</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/02/15/289863.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/289863.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/02/15/289863.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/289863.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/289863.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在SQL语句优化过程中，我们经常会用到hint,现总结一下在SQL优化过程中常见Oracle Hint的用法：<br>&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/02/15/289863.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/289863.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-02-15 20:48 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2009/01/27/289049.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/289049.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/01/27/289049.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/289049.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/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了min和max函数,结果查询很慢，但是单独执行min或者max时速度很快，建个环境模拟一下:&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/01/27/289049.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/289049.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-01-27 21:38 <a href="http://www.blogjava.net/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时不走索引的问题</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2009/01/26/289048.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/289048.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2009/01/26/289048.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/289048.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/289048.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天工作上遇到了一个问题，一个好几万数据的大表update数据时不走索引，时间长到无法忍受。建一个环境模拟一下：&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2009/01/26/289048.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/289048.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2009-01-26 18:16 <a href="http://www.blogjava.net/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的小秘密[转]</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2008/12/30/288938.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/288938.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/12/30/288938.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/288938.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/288938.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 今天看到一个帖子，学了几个SQLPLUS的小技巧。说实话还挺不错的，确实没有花时间看过Oracle关于SQLPLUS的文档，总觉得有点浪费时间，呵呵，不过这样知识就永远掌握得不牢靠，忘记了要去查，不过要能抽出时间看这种文档，估计要等1-2年之后了。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/12/30/288938.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/288938.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-12-30 20:01 <a href="http://www.blogjava.net/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中正则表达式的应用</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2008/12/29/289043.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/289043.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/12/29/289043.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/289043.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/289043.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在ITPUB上看到个帖子，计算四则运算的，顺便来学习一下10g里的正则表达式。原帖地址：http://www.itpub.net/viewthread.php?tid=1051167&extra=page%3D1%26amp%3Bfilter%3Ddigest&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/12/29/289043.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/289043.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-12-29 21:17 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2008/12/27/289041.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/289041.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/12/27/289041.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/289041.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/289041.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 蛮有意思的一段SQL，拿来看一下。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/12/27/289041.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/289041.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-12-27 21:31 <a href="http://www.blogjava.net/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基础命令学习笔记</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2008/11/30/286844.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/286844.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/11/30/286844.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/286844.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/286844.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 依旧是我当年学习的笔记之一，这是在学习SQL Plus时记的。其实在SQL Plus下是有很多其他地方不能使用的功能和技巧的，不过这边只是一个基本的应用，不涉及一些复杂的东西。好，下面看一下内容：&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/11/30/286844.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/286844.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-11-30 20:29 <a href="http://www.blogjava.net/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基本函数学习笔记</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2008/11/29/286840.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/286840.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/11/29/286840.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/286840.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/286840.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 这是我很久以前刚开始学习SQL时作的笔记，今天翻资料的时候被我翻了出来，觉得放在那里以后遗失掉了也是可惜，不如放到博客上，以后也可以看看，还可以帮助一些刚开始学习SQL的朋友入个门。不过都是按我自己的掌握程度来记的，估计也不太适合别人，就随便看看吧。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/11/29/286840.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/286840.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-11-29 20:46 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2008/11/01/286839.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/286839.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/11/01/286839.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/286839.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/286839.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 大牛写的这两段SQL实在是太销魂了，实在是忍不住要转载过来，留着以后慢慢看，太牛了…… http://www.itpub.net/viewthread.php?tid=981654&extra=&page=1&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/11/01/286839.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/286839.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-11-01 19:47 <a href="http://www.blogjava.net/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 的长度</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2008/10/30/286830.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/286830.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/10/30/286830.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/286830.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/286830.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 最近碰到了varchar2和number的限制问题，所以专门去查询了Oracle中对varchar2和number最大值的说明，一查还真发现之前了解的很少。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.blogjava.net/decode360/archive/2008/10/30/286830.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/286830.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-10-30 19:32 <a href="http://www.blogjava.net/decode360/archive/2008/10/30/286830.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>小数点前的0的显示问题</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2008/10/29/286824.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/286824.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/10/29/286824.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/286824.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/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对于小于1的小数，小数点前面的0是不显示的。这个问题遇到的很普遍，解决的方法也挺多的。大致上研究了一下这个问题，提供了用to_char和decode函数来解决这个问题的两种方法。先来看一下这个问题：&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/10/29/286824.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/286824.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-10-29 21:12 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2008/10/23/286822.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/286822.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/10/23/286822.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/286822.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/286822.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在PLSQL中操作数据转化过程中经常会用到MERGE语句，MERGE函数是Oracle9i新增的函数，基本上就是等于update和insert两个函数的相加。使用MERGE函数，通过判断两个表之间某字段的关联情况，如果关联匹配上的话就进行update操作，如果没有匹配就执行insert。这个函数一来是减少了程序的长度，而且只对表进行一次全表扫描，效率也会有所提高。&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/10/23/286822.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/286822.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-10-23 19:51 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2008/09/30/286066.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/286066.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/09/30/286066.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/286066.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/286066.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 字符串分割是一个经常会用到的功能，无论用什么语言。在Oracle里，可以解决字符串分割的方法有很多种，如果写Function，应该是可以可以写出适用性非常高的函数的。不过现在什么都流行直接用SQL来解决，下面转两篇文章来学习一下&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/09/30/286066.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/286066.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-09-30 23:43 <a href="http://www.blogjava.net/decode360/archive/2008/09/30/286066.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>打印九九乘法表</title><link>http://www.blogjava.net/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.blogjava.net/decode360/archive/2008/09/29/286065.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/286065.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/09/29/286065.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/286065.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/286065.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 网上找到的打印九九乘法表的SQL程序，关键的一些思路还是很有借鉴价值的。其实几乎所有比较复杂的SQL基本上都会用到像lag、connect by、rownum、分析函数这些东西，逐渐看着看着，也就习惯了。下面分几个类型介绍&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/09/29/286065.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/286065.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-09-29 21:22 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2008/09/08/283584.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/283584.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/09/08/283584.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/283584.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/283584.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在数据库开发的过程中，行列转换是一个一定会遇到的问题，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，需要进行模块化的PLSQL编程来解决。本文摘录了在Oracle环境下，解决单个字符的行列转换问题的几种常用方法，具体如下：&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/09/08/283584.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/283584.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-09-08 19:31 <a href="http://www.blogjava.net/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.blogjava.net/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.blogjava.net/decode360/archive/2008/09/06/283567.html</guid><wfw:comment>http://www.blogjava.net/decode360/comments/283567.html</wfw:comment><comments>http://www.blogjava.net/decode360/archive/2008/09/06/283567.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/decode360/comments/commentRss/283567.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/decode360/services/trackbacks/283567.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在平常的数据处理中，特别是数据清洗阶段，要获取字段中数字部分往往都是经常会用到的要求。所以专门找了一下有哪几种方法可以实现这个功能。10g中已经提供了正则表达式的功能，所以这个事情变得方便了很多，但是还是比较喜欢用translate函数来获取的这个方法，非常巧妙，这个是转载的地址：http://zhouwf0726.itpub.net/post/9689/191406&nbsp;&nbsp;<a href='http://www.blogjava.net/decode360/archive/2008/09/06/283567.html'>阅读全文</a><img src ="http://www.blogjava.net/decode360/aggbug/283567.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/decode360/" target="_blank">decode360</a> 2008-09-06 19:27 <a href="http://www.blogjava.net/decode360/archive/2008/09/06/283567.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>