zoukankan      html  css  js  c++  java
  • 炸裂函数explode

    lateral viem 表的关联只能和explode使用

    hive> select explode(info) from t_map where id=1;

    hive> create table watch(id int,name string) row format delimited fields terminated by " ";

     vim movie.txt

    1 CN_lldd
    2 CN_sjd
    3 CN_jp
    4 CN_rpt
    5 USA_yns
    6 USA_sd
    7 USA_ydfdf
    8 USA_gdffd



    load data local inpath "/movie.txt" into table watch;

    //创建数据文件

    1 lldq js|kh|dz|yq
    2 sdyjq dz|js|js
    3 yw ll|yq|dz

    //上传数据

    load data local inpath "/mv.txt" into table mv;

    //将数据炸开

    hive> select explode(split(types,"\|")) from mv;

    //求有几种类型

    hive> select count(*) from (select explode(split(types,"\|"))type from mv) t group by t.type;

    hive> select count(*),type from (select explode(split(types,"\|"))type from mv) t group by t.type;

    //将炸裂的数据和 表关联 lateral view

    hive> select id,name,type from mv lateral view explode(split(types,"\|")) t as type 

  • 相关阅读:
    hdu 1047 Integer Inquiry
    大数模板(高精度)
    git 学习
    java List 排序
    简单排序总结
    JDK1.8
    webservice 学习笔记 1
    inline-block,inline,block,table-cell,float
    mybatis 学习视频总结记录
    left join right inner join 区别
  • 原文地址:https://www.cnblogs.com/JBLi/p/10861977.html
Copyright © 2011-2022 走看看