Hive常用命令及作用

-- 内部表
create table aa(col1 string,col2 int) partitioned by(statdate int) ROW FORMAT DELIMITED FIELDS TERMINATED BY ‘\t‘；
-- 外部表
create external table bb(col1 string, col2 int) partitioned by(statdate int) ROW FORMAT DELIMITED FIELDS TERMINATED BY ‘\t‘ location ‘/user/gaofei.lu/‘;

show create table tablename;

本地数据：load data local inpath ‘ /home/gaofei.lu/aa.txt‘ into table aa partition(statdate=20170403)
hdfs上数据：load data inpath ‘/user/gaofei.lu/aa.txt‘ into table bb partition(statdate=20170403)

alter table aa set tblproperties (‘EXTERNAL‘=‘TRUE‘)
alter table bb set tblproperties (‘EXTERNAL‘=‘FALSE‘)

修改列名和列数据类型：alter table aa change col2 name string ;
修改位置放置第一位：alter table aa change col2 name string first;
修改位置指定某一列后面：alter table aa change col1 dept string after name;

alter table aa add columns(col3 string);

alter table aa rename to aa_test;

alter table aa add partition(statdate=20170404);
alter table bb add partition(statdate=20170404) location ‘/user/gaofei.lu/20170404.txt‘;

show partitioins aa;

alter table aa partition(statdate=20170404) rename to partition(statdate=20170405);
alter table bb partition(statdate=20170404) set location ‘/user/gaofei.lu/aa.txt‘;

alter table aa drop if exists partition(statdate=20170404);

beeline  !connect jdbc:hive2://192.168.1.17:10000

set hive.execution.engine=spark

yarn application -kill job_id

insert overwrite local directory ‘/home/hadoop/gaofeilu/test_delimited.txt‘
row format delimited
fields terminated by ‘\t‘
select * from test;