创建hive数据仓库：
create table docs(line string);
从hdfs上传文件到数据库：
load data inpath 'file:///usr/local/hadoop/input' overwrite into table docs;
根据词汇查询词汇数量：
create table word_count as select word, count(1) as count from (select explode(split(line,' '))as word from docs) w group by word order by word;