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//多种数据类型 阅读全文
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create index id_index on table t_cluster(id) as "org.apache.hadoop.hive.ql.index.compact.CompactIndexHandler" with deferred rebuild; 阅读全文
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看的次数多 或者 评分高 每个用户最喜欢哪个类型的电影 row_number() ratings表中一个电影出现几次? 一个电影有几种类型? 类型在movies 评分或者观看次数ratings movies join ratings //将类型炸开 select mid,mname,lx from 阅读全文
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alter table store set SERDEPROPERTIES('field.delim'='\t'); 阅读全文
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1,F,1,10,48067 2,M,56,16,70072 3,M,25,15,55117 4,M,45,7,02460 5,M,25,20,55455 6,F,50,9,55117 7,M,35,1,06810 8,M,25,12,11413 9,M,25,17,61614 10,F,35,1,95370 11,F,25,1,04093 12,M,25,12,32793 13,M,45,1,... 阅读全文
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1,1193,5,978300760 1,661,3,978302109 1,914,3,978301968 1,3408,4,978300275 1,2355,5,978824291 1,1197,3,978302268 1,1287,5,978302039 1,2804,5,978300719 1,594,4,978302268 1,919,4,978301368 1,595,5,97882... 阅读全文
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上面数据有问题 下面是经过清洗的数据 阅读全文
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age.txt job.txt 阅读全文