Hive的啟動方式
- CLI
- Web UI
- 遠程服務啟動方式
(1)hive命令行的交互模式,進入hive:
hive; hive --service cli; hive -S;(設置Hive靜默模式,不打印 map reduce info)
(2)不進入hive的交互模式,在操作系統的提示符下進行操作:
$hive -e 'show tables'; $hive -S -e 'show tables'; (靜默模式:不輸出調試信)
(3)退出hive:
quit; exit;
(4)清屏:
Ctrl+L or !clear;
(5)函數:
show functions;
(6)查看表結構:
desc tableName;
(7)查看HDFS上的文件:
dfs -ls dir; dfs -ls /user
(8)遞歸查看目錄結構:
dfs -lsr /user
(9)在hive下執行操作系統的命令:!命令
!pwd
!ls
...
(10)在CLI下執行HQL語句:
select * from tableName; (will not change to map reduce, because it just need to read all file context.) select tname from tableName; (open a map reduce job to execute)
(11)在CLI下執行SQL腳本:
vi my.sql; source dir/my.sql;
