<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[44683331的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qq_44683331</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_44683331]]></copyright><item><title><![CDATA[安装sqoop]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/128573838</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/128573838</guid><author>qq_44683331</author><pubDate>Fri, 06 Jan 2023 10:49:02 +0800</pubDate><description><![CDATA[sqoop 搭建
使用sqoop进行数据得导入导出]]></description><category></category></item><item><title><![CDATA[Hadoop集群搭建]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/128573571</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/128573571</guid><author>qq_44683331</author><pubDate>Fri, 06 Jan 2023 09:39:23 +0800</pubDate><description><![CDATA[Hadoop集群得安装以及安装之后不能启动得问题解决]]></description><category></category></item><item><title><![CDATA[hive集群搭建]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/128564668</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/128564668</guid><author>qq_44683331</author><pubDate>Thu, 05 Jan 2023 16:04:05 +0800</pubDate><description><![CDATA[hive集群得搭建 以及crontab定时任务得设定]]></description><category></category></item><item><title><![CDATA[hive的优化]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/88045566</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/88045566</guid><author>qq_44683331</author><pubDate>Thu, 11 Mar 2021 16:56:33 +0800</pubDate><description><![CDATA[1.列剪裁
在通过hive读取数据的时候,并不是所有的需求都要获取表内的所有数据
有些只需要读取所有列中的几列,而忽略其他列的数据
列剪裁的设置为hive.optimize.cp  默认设置true
2.分区剪裁
在hive中,可以根据多个维度对hive表进行分区操作,且分区也可以多层嵌套
当有需要对目标表的某一个区域内的数据进行分析而不需要设计其他区域时
可以使用分区裁剪,将目标区域以条件的形式...]]></description><category></category></item><item><title><![CDATA[Springboot启动失败]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/88559432</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/88559432</guid><author>qq_44683331</author><pubDate>Thu, 14 Mar 2019 19:21:34 +0800</pubDate><description><![CDATA[问题描述：
Description:
Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class
Action:
Consid...]]></description><category></category></item><item><title><![CDATA[Springboot时报错：Description:  The Bean Validation API is on the classpath but no implementation could]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/88352539</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/88352539</guid><author>qq_44683331</author><pubDate>Fri, 08 Mar 2019 15:41:09 +0800</pubDate><description><![CDATA[报错信息：
解决办法：
在pom文件里添加一个依赖

org.hibernate
hibernate-validator
5.3.0.Final


]]></description><category></category></item><item><title><![CDATA[scala练习题]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/87945985</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/87945985</guid><author>qq_44683331</author><pubDate>Tue, 26 Feb 2019 20:01:05 +0800</pubDate><description><![CDATA[//设置一个映射，其中包含你想要的一些装备，以及他们的价格
//然后构建另一个映射，采用同一组建，但在价格上打9折
/def main(args: Array[String]): Unit = {
val score=Map(“98k”-&amp;gt; 222,“贪玩蓝月”-&amp;gt;555)
val s=for((k,v)&amp;lt;- score)yield (k,v0.9)
println(s)
}*/...]]></description><category></category></item><item><title><![CDATA[创建一个Car类，以只读属性对应制造商，型号名称，型号年份以及一个可读写的属性用于车牌。提供四组构造器。每个构造器fc都要求制造商和型号为必填。型号年份和车牌可选，如果未填，则型号年份为-1，车牌为空]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/87945899</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/87945899</guid><author>qq_44683331</author><pubDate>Tue, 26 Feb 2019 19:59:22 +0800</pubDate><description><![CDATA[class Car(val produce:String,val model:String,val modelYear:Int,carNum:String) {
def this(produce:String,model:String){
this(produce,model,-1,&quot;&quot;)
}
def this (produce:String,model:String,modelYear:Int)...]]></description><category></category></item><item><title><![CDATA[干净卸载mysql]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/87938948</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/87938948</guid><author>qq_44683331</author><pubDate>Tue, 26 Feb 2019 17:12:55 +0800</pubDate><description><![CDATA[一、在控制面板中卸载mysql软件

二、卸载过后删除C:\Program Files (x86)\MySQL该目录下剩余了所有文件，把mysql文件夹也删了
三、windows+R运行“regedit”文件，打开注册表

四、删除注册表：HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\MySQL文件夹

...]]></description><category></category></item><item><title><![CDATA[idea的快捷键]]></title><link>https://blog.youkuaiyun.com/qq_44683331/article/details/87938237</link><guid>https://blog.youkuaiyun.com/qq_44683331/article/details/87938237</guid><author>qq_44683331</author><pubDate>Tue, 26 Feb 2019 16:47:52 +0800</pubDate><description><![CDATA[Ctrl+Shift + Enter，语句完成
“！”，否定完成，输入表达式时按 “！”键
Ctrl+E，最近的文件
Ctrl+Shift+E，最近更改的文件
Shift+Click，可以关闭文件
Ctrl+[ OR ]，可以跑到大括号的开头与结尾
Ctrl+F12，可以显示当前文件的结构
Ctrl+F7，可以查询当前元素在当前文件中的引用，然后按 F3 可以选择
Ctrl+N，可以快速打开类
C...]]></description><category></category></item></channel></rss>