- 1 . 创建表
-- 内部表
create table a1(col1 string,col2 int) partitioned by(statdate int) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t';
-- 外部表
create external table b1(col1 string, col2 int) partitioned by(statdate int) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' location '/user/gaofei.lu/';
- 2 . 查看创建表语句
show create table tablename;
- 3 . 导入表数据
本地数据:load data local inpath ' /home/feifei/aa.txt' into table aa partition(statdate=20180315)
hdfs上数据:load data inpath '/user/feifei/aa.txt' into table bb partition(statdate=20180315)
- 4-修改表属性
alter table aa set tblproperties ('EXTERNAL'='TRUE')
alter table bb set tblproperties ('EXTERNAL'='FALSE')
- 5 . 修改列
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;
- 6 . 添加列(慎用)
alter table aa add columns(col3 string);
- 7 . 表重命名
alter table aa rename to aa_test;
- 8 . 添加分区
alter table aa add partition(statdate=20180315);
alter table bb add partition(statdate=20180315) location '/user/gaofei.lu/20180315.txt';
- 9 . 查看表分区
show partitioins aa;
- 10 . 修改分区
alter table aa partition(statdate=20180315) rename to partition(statdate=20180316);
alter table bb partition(statdate=20180315) set location '/user/gaofei.lu/aa.txt';
- 11 . 删除分区
alter table aa drop if exists partition(statdate=20180315);
- 12 . beeline连接
beeline !connect jdbc:hive2://192.168.1.01:10000
- 13 . 设置hive on spark
set hive.execution.engine=spark
- 14 . 终止任务
yarn application -kill job_id
- 15 . 指定分隔符导出文件
insert overwrite local directory '/home/hadoop/gaofeilu/test_delimited.txt'
row format delimited
fields terminated by '\t'
select * from test;
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