hive常用命令
show tables;
列出hive里面所有数据表名
desc userProfile;
显示数据表userProfile的基本表字段及字段type
desc extended trackinfo;
显示数据表trackinfo的详细信息,包括字段说明,数据表等
/usr/local/cloud/hive/bin/hive
进入hive数据库
select attribute_name from pms_attribute where attribute_id=21000 and attribute_value_id=105991;
hive的select操作
select user_id, category_id, catgory_pref, attribute_id, attribute_pref, attribute_value_id, attribute_value_pref from userProfile limit 10;
hive的select操作,只显示10行
/usr/local/cloud/hive/bin/hive -e "select category_id, attribute_id, count(user_id) from userProfile group by category_id, attribute_id" >> /home/deploy/recsys/workspace/ouyangyewei/statistics_data/number_attention_of_attribute_for_mobilePhone.csv;
将sql查询的数据导出到csv文件中