<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[ypc45的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/ypc45</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; ypc45]]></copyright><item><title><![CDATA[关于double与float失精问题解决方案]]></title><link>https://blog.youkuaiyun.com/ypc45/article/details/77966671</link><guid>https://blog.youkuaiyun.com/ypc45/article/details/77966671</guid><author>ypc45</author><pubDate>Wed, 13 Sep 2017 15:25:00 +0800</pubDate><description><![CDATA[在做计算Excel中数据相加时，因为数据都是小数，如果用double+=double，会出现失精的情况。需要用到BigDecimal类。


详情见 
http://blog.youkuaiyun.com/yinan9/article/details/17283081]]></description><category></category></item><item><title><![CDATA[oracle按某两个字段的两个值排序]]></title><link>https://blog.youkuaiyun.com/ypc45/article/details/75119458</link><guid>https://blog.youkuaiyun.com/ypc45/article/details/75119458</guid><author>ypc45</author><pubDate>Fri, 14 Jul 2017 16:16:04 +0800</pubDate><description><![CDATA[现有一张表，有code和number两个字段，现在需要排序，排序规则是 code=‘2’ >code='1'>number='1'>code='3'


即需要code为2排在第一 code为1其次 当code为1时，number为1排在前，再是code为3时排在最后


select * form table_name order by case code when '2' then]]></description><category></category></item><item><title><![CDATA[new begin]]></title><link>https://blog.youkuaiyun.com/ypc45/article/details/75006414</link><guid>https://blog.youkuaiyun.com/ypc45/article/details/75006414</guid><author>ypc45</author><pubDate>Wed, 12 Jul 2017 11:12:22 +0800</pubDate><description><![CDATA[从今天开始，开始写自己的博客了，希望能够好好坚持。]]></description><category></category></item></channel></rss>