Hive的基本操作

建立庫

create database if not exists xxuu_test;

show databases;

show databases like 'xxuu_*'

//查詢庫的hdfs路徑

desc database xxuu_test;
desc database extended xxuu_test;

drop database if exists xxuu_test;

use xxuu_test;

(內部表，外部表，分割槽表，分桶表)

語法說明：

create [external] table [if not exists] table_name 

[(col_name data_type [comment col_comment], ...)] 
[comment table_comment] 
[partitioned by (col_name data_type [comment col_comment], ...)] 
[clustered by (col_name, col_name, ...) 
[sorted by (col_name [asc|desc], ...)] into num_buckets buckets] 
[row format row_format] 
[stored as file_format] 
[location hdfs_path]

create table if not exists dim_wd_djzclx(

djzclxdl_dm string,
djzclxdlmc string,
djzclxzl_dm string,
djzclxzlmc string,
djzclxxl_dm string,
djzclxxlmc string,
gybz string
)row format delimited
fields terminated by ','
stored as textfile;

create external table if not exists ext_dim_wd_djzclx(

djzclxdl_dm string,
djzclxdlmc string,
djzclxzl_dm string,
djzclxzlmc string,
djzclxxl_dm string,
djzclxxlmc string,
gybz string
)row format delimited
fields terminated by ','
location '/opt/gengxu/external/ext_dim_wd_djzclx';

create  table if not exists par_dim_wd_djzclx(

djzclxdl_dm string,
djzclxdlmc string,
djzclxzl_dm string,
djzclxzlmc string,
djzclxxl_dm string,
djzclxxlmc string,
gybz string
)partitioned by (djzclxdl_dm string) 
row format delimited
fields terminated by ',';

刪除表

drop table dim_wd_djzclx

查詢資料

匯入資料

load data local inpath '/opt/gengxu/hadoop_output_data/dim_wd_djzclx/000000_0' overwrite into table dim_wd_djzclx;

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