通过hadoop上的hive完成WordCount
启动hadoop
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start-all.sh |

Hdfs上创建文件夹
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hdfs dfs -mkdir songinputhdfs dfs -ls /user/hadoop |

上传文件至hdfs:
下载歌词songs.txt保存在~/hadoop里,查询目录
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cd ~/hadoopls |

上传至hdfs
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hdfs dfs -put ./songs.txt songinputhdfs dfs -ls /user/hadoop/songinput |

启动Hive
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hive |

创建原始文档表
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create table docs(line string);<br>show tables; |

导入文件内容到表docs并查看
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load data inpath '/user/hadoop/songinput/songs.txt' overwrite into table docs;<br>select * fromdocs; |


用HQL进行词频统计,结果放在表word_count里
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create table word_count as select word,count(1) from (select explode(split(line,' ')) as word from docs) word group by word; |

查看统计结果
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select * from word_count; |


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