- Hive中追加导入数据的4种方式是什么?请写出简要语法
- 从本地导入: load data local inpath ‘/home/1.txt’ (overwrite)into table student;
- 从Hdfs导入: load data inpath ‘/user/hive/warehouse/1.txt’ (overwrite)into table student;
- 查询导入: create table student1 as select * from student;(也可以具体查询某项数据)
- 查询结果导入:insert (overwrite)into table staff select * from track_log;
- Hive导出数据有几种方式?如何导出数据
- 用insert overwrite导出方式
导出到本地:
insert overwrite local directory ‘/home/robot/1/2’ row format delimited fields terminated by ‘\t’ select * from staff;(递归创建目录)
导出到HDFS
insert overwrite directory ‘/user/hive/1/2’ row format delimited fields terminated by ‘\t’ select * from staff;
- Bash shell覆盖追加导出
$ bin/hive -e “select * from staff;” > /home/z/backup.log
- Sqoop把hive数据导出到外部