通过hadoop上的hive完成WordCount
启动hadoop
Hdfs上创建文件夹
上传文件至hdfs
启动Hive
创建原始文档表
导入文件内容到表docs并查看
用HQL进行词频统计,结果放在表word_count里
查看统计结果
ssh localhost cd /usr/local/hadoop ./sbin/start-dfs.sh cd /usr/local/hive/lib service mysql start start-all.sh hdfs dfs -mkdir test1 hdfs dfs -ls /user/hadoop hdfs dfs -put ./123.txt test1 hdfs dfs -ls /user/hadoop/test1 hive create table docs(line string) load data inpath '/user/hadoop/tese1/123.txt' overwrite into table docs select * from docs create table word_count as select word,count(1) as count from (select explode(split(line," ")) as word from docs) word group by word order by word; show tables; select * from word_count;