Hive導入導出方式

• Hive中追加導入數據的4種方式是什麼？請寫出簡要語法

1. 從本地導入： load data local inpath ‘/home/1.txt’ (overwrite)into table student;
2. 從Hdfs導入： load data inpath ‘/user/hive/warehouse/1.txt’ (overwrite)into table student;
3. 查詢導入： create table student1 as select * from student;(也可以具體查詢某項數據)
4. 查詢結果導入：insert （overwrite）into table staff select * from track_log;

• Hive導出數據有幾種方式？如何導出數據

1. 用insert overwrite導出方式
   導出到本地：

insert overwrite local directory ‘/home/robot/1/2’ row format delimited fields terminated by ‘\t’ select * from staff;(遞歸創建目錄)

導出到HDFS

insert overwrite directory ‘/user/hive/1/2’ row format delimited fields terminated by ‘\t’ select * from staff;

3. Bash shell覆蓋追加導出

$ bin/hive -e “select * from staff;” > /home/z/backup.log

4. Sqoop把hive數據導出到外部