Hive---案例7-6 列转行

1、Hive实例操作

（1）创建本地movie.txt文件。

vim movie.txt
疑犯追踪 悬疑,动作,科幻,剧情

Lie to me 悬疑,警匪,动作,心理,剧情

特种部队 战争,动作,灾难

（2）创建Hive表movie，

hive(hivedwh)>create table movie(

movie string,

category array<string>

)

row format delimited fields terminated

by "\t" collection items terminated

by ",";

（3）导入数据

load data local inpath "/opt/datas/movie.txt" into table movie;

（3）按需求查询数据

hive(hivedwh)>

select movie, category_name

from movie lateral view explode(category) subView

as category_name;