﻿<?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>博客园-Wind-Snail-随笔分类-Database</title><link>http://www.cnblogs.com/Wind-Snail/category/109168.html</link><description /><language>zh-cn</language><lastBuildDate>Wed, 28 May 2008 23:08:11 GMT</lastBuildDate><pubDate>Wed, 28 May 2008 23:08:11 GMT</pubDate><ttl>60</ttl><item><title>Five Ways to Rev up Your SQL Performance </title><link>http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110938.html</link><dc:creator>Wind Snail</dc:creator><author>Wind Snail</author><pubDate>Tue, 18 Mar 2008 01:30:00 GMT</pubDate><guid>http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110938.html</guid><wfw:comment>http://www.cnblogs.com/Wind-Snail/comments/1110938.html</wfw:comment><comments>http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110938.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/Wind-Snail/comments/commentRss/1110938.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/Wind-Snail/services/trackbacks/1110938.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: sometimesallittakesisalittletweakhereortheretomakeyourapplicationrunmuchfaster.Ah,...&nbsp;&nbsp;<a href='http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110938.html'>阅读全文</a><img src ="http://www.cnblogs.com/Wind-Snail/aggbug/1110938.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://Wind-Snail.cnblogs.com/" target="_blank">Wind Snail</a> 2008-03-18 09:30 <a href="http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110938.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>使用 PIVOT 和 UNPIVOT</title><link>http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110928.html</link><dc:creator>Wind Snail</dc:creator><author>Wind Snail</author><pubDate>Tue, 18 Mar 2008 01:26:00 GMT</pubDate><guid>http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110928.html</guid><wfw:comment>http://www.cnblogs.com/Wind-Snail/comments/1110928.html</wfw:comment><comments>http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110928.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/Wind-Snail/comments/commentRss/1110928.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/Wind-Snail/services/trackbacks/1110928.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 可以使用PIVOT和UNPIVOT关系运算符将表值表达式更改为另一个表。PIVOT通过将表达式某一列中的唯一值转换为输出中的多个列来旋转表值表达式，并在必要时对最终输出中所需的任何其余列值执...&nbsp;&nbsp;<a href='http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110928.html'>阅读全文</a><img src ="http://www.cnblogs.com/Wind-Snail/aggbug/1110928.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://Wind-Snail.cnblogs.com/" target="_blank">Wind Snail</a> 2008-03-18 09:26 <a href="http://www.cnblogs.com/Wind-Snail/archive/2008/03/18/1110928.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>SQL Server SQL语句调优技巧</title><link>http://www.cnblogs.com/Wind-Snail/archive/2008/01/10/1033031.html</link><dc:creator>Wind Snail</dc:creator><author>Wind Snail</author><pubDate>Thu, 10 Jan 2008 01:54:00 GMT</pubDate><guid>http://www.cnblogs.com/Wind-Snail/archive/2008/01/10/1033031.html</guid><wfw:comment>http://www.cnblogs.com/Wind-Snail/comments/1033031.html</wfw:comment><comments>http://www.cnblogs.com/Wind-Snail/archive/2008/01/10/1033031.html#Feedback</comments><slash:comments>1</slash:comments><wfw:commentRss>http://www.cnblogs.com/Wind-Snail/comments/commentRss/1033031.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/Wind-Snail/services/trackbacks/1033031.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 子查询优化&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;一条好的值得称赞的规则是尽量用连接代替所有的子查询。优化器有时可以自动将子查询&#8220;扁平化&#8221;，并...&nbsp;&nbsp;<a href='http://www.cnblogs.com/Wind-Snail/archive/2008/01/10/1033031.html'>阅读全文</a><img src ="http://www.cnblogs.com/Wind-Snail/aggbug/1033031.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://Wind-Snail.cnblogs.com/" target="_blank">Wind Snail</a> 2008-01-10 09:54 <a href="http://www.cnblogs.com/Wind-Snail/archive/2008/01/10/1033031.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>sql server事务全攻略</title><link>http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924081.html</link><dc:creator>Wind Snail</dc:creator><author>Wind Snail</author><pubDate>Sun, 14 Oct 2007 14:24:00 GMT</pubDate><guid>http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924081.html</guid><wfw:comment>http://www.cnblogs.com/Wind-Snail/comments/924081.html</wfw:comment><comments>http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924081.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/Wind-Snail/comments/commentRss/924081.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/Wind-Snail/services/trackbacks/924081.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 一事务的属性事务具有ACID属性即Atomic原子性,Consistent一致性,Isolated隔离性,Durable永久性原子性就是事务应作为一个工作单元,事务处...&nbsp;&nbsp;<a href='http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924081.html'>阅读全文</a><img src ="http://www.cnblogs.com/Wind-Snail/aggbug/924081.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://Wind-Snail.cnblogs.com/" target="_blank">Wind Snail</a> 2007-10-14 22:24 <a href="http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924081.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>数据库主键设计之思考</title><link>http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924007.html</link><dc:creator>Wind Snail</dc:creator><author>Wind Snail</author><pubDate>Sun, 14 Oct 2007 13:18:00 GMT</pubDate><guid>http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924007.html</guid><wfw:comment>http://www.cnblogs.com/Wind-Snail/comments/924007.html</wfw:comment><comments>http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924007.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/Wind-Snail/comments/commentRss/924007.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/Wind-Snail/services/trackbacks/924007.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 主键的必要性有些朋友可能不提倡数据库表必须要主键，但在我的思考中，觉得每个表都应该具有主键，不管是单主键还是双主键，主键的存在就代表着表结构的完整性，表的记录必须得有唯一区分的字段，主键主要是用于...&nbsp;&nbsp;<a href='http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924007.html'>阅读全文</a><img src ="http://www.cnblogs.com/Wind-Snail/aggbug/924007.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://Wind-Snail.cnblogs.com/" target="_blank">Wind Snail</a> 2007-10-14 21:18 <a href="http://www.cnblogs.com/Wind-Snail/archive/2007/10/14/924007.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>