hive基本操作与应用

hdfs dfs -mkdir songinput
hdfs dfs -ls /user/hadoop

cd ~/hadoop
ls

hdfs dfs -put ./songs.txt songinput
hdfs dfs -ls /user/hadoop/songinput

hive

create table docs(line string);<br>show tables;

load data inpath ‘/user/hadoop/songinput/songs.txt‘ overwrite into table docs;<br>select * from docs;

create table word_count as select word,count(1) from (select explode(split(line,‘ ‘)) as word from docs) word group by word;

select * from word_count;