链接: 第一种:https://blog.csdn.net/u010022051/article/details/51205765 第二种:https://blog.csdn.net/zmywei_20160707/article/details/77930487 包含安装yum源,mysql等 Read More
一: 配置: 1.配置yarn-site.xml <property><name>yarn.resourcemanager.am.max-attempts</name><value>4</value></property> 2.配置flink的flink-conf.yaml high-availab Read More
键入“cd /etc/init.d”，进入该目录键入“./crond restart”，重启crond服务 Read More
查找住院,门诊的人数: SELECT a.leixing,COUNT(a.leixing)FROM(SELECT case resource_type WHEN 'O' THEN '住院'WHEN 'I' THEN '门诊'ELSE '其他' END as leixingFROM `doc_info Read More
1 package com.zjlantone.hive 2 3 import java.util.Properties 4 5 import com.zjlantone.hive.SparkOperaterHive.sparkSession 6 import org.apache.spark.rd Read More
1、mysql语句实现年龄分布select nnd as '年龄段',count(*) as '人数' from( select case when age>=1 and age<=10 then '1-10' when age>=11 and age<=20 then '11-20' when a Read More
package org.langtong.sparkdemo; import com.fasterxml.jackson.databind.ObjectMapper; import org.apache.spark.SparkConf; import org.apache.spark.SparkCo Read More
直接上代码:包含了,map,filter,persist,mapPartitions等函数 String master = "spark://192.168.2.279:7077"; // jsc = getContext("local[2]"); jsc = getContext(master); Read More
直接上代码: 第一部分: case class OrdPacsresult_obj(pk_dcpv: String, result_obj: String) 第二部分: def ordsubj: Unit = { import sparkSession.implicits._ import spar Read More
第一种方式: def operatorHive: Unit = { Class.forName("org.apache.hive.jdbc.HiveDriver") val url = "jdbc:hive2://192.168.2.xxx:10000" val connection: Connec Read More