HIVE 命令记录

HIVE 命令记录

设置hive运行的队列

hive> set mapreduce.job.queuename=ven12;

打印列名

hive> set hive.cli.print.header=true;

创建新表

hive> CREATE TABLE t_hive (a int, b int, c int) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t';

正则匹配表名

hive>show tables '*t*';

增加一个字段

hive> ALTER TABLE t_hive ADD COLUMNS (new_col String);

重命令表名

hive> ALTER TABLE t_hive RENAME TO t_hadoop;

从HDFS加载数据

hive> LOAD DATA INPATH '/user/hive/warehouse/t_hive/t_hive.txt' OVERWRITE INTO TABLE t_hive2;

导入数据t_hive.txt到t_hive表

hive> LOAD DATA LOCAL INPATH '/home/cos/demo/t_hive.txt' OVERWRITE INTO TABLE t_hive ;

从其他表导入数据

hive> INSERT OVERWRITE TABLE t_hive2 SELECT * FROM t_hive ;

创建表并从其他表导入数据

hive> CREATE TABLE t_hive AS SELECT * FROM t_hive2 ;

仅复制表结构不导数据

hive> CREATE TABLE t_hive3 LIKE t_hive;

通过Hive导出到本地文件系统

hive> INSERT OVERWRITE LOCAL DIRECTORY '/home/test/fix_app_result.txt' select appid,count(1) from dpi_result_fix_list where appid<>'' and appid like '23%' group by appid;

创建视图

hive> CREATE VIEW v_hive AS SELECT a,b FROM t_hive;

删表

drop table if exists t_hft;

创建分区表

DROP TABLE IF EXISTS t_hft;
CREATE TABLE t_hft(
SecurityID STRING,
tradeTime STRING,
PreClosePx DOUBLE
) PARTITIONED BY (tradeDate INT)
ROW FORMAT DELIMITED FIELDS TERMINATED BY ',';

导入分区数据

hive> load data local inpath '/home/BlueBreeze/data/t_hft_1.csv' overwrite into table t_hft partition(tradeDate=20130627);

查看分区表

hive> SHOW PARTITIONS t_hft;