Hive DML之資料的匯入匯出

通過查詢語句向表中插入資料

查詢語句中建立表並且載入資料

import資料到指定hive表

資料的匯出

load

data
[local
] inpath 'datapath'
[overwrite]
into
table table_name [
partition
(partcoll=val1,..
..)]
;

load

data
local inpath '/home/data/a.txt' overwrite into
table student;

create

table student (id int
,name string)
row format delimited fields
terminated
by'\t'
;

insert

into
table student values(1
,'zs'),
(2,'ls'
);

insert overwrite table student select id,name from stu where

month
='2020-11'
;

insert overwrite table student partition

(month
='2020-10'
)select id,name from stu where
month
='2020-10'
insert overwrite table student partition
(month
='2020-11'
)select id,name from stu where
month
='2020-11'
;//如果查詢的是一張表的裡的內容，from student可以提前
from stu
insert overwrite table student partition
(month
='2020-10'
)select id,name where
month
='2020-10'
insert overwrite table student partition
(month
='2020-11'
)select id,name where
month
='2020-11'
;

create

table
ifnot
exists student as
select id,name from stu;

import

table student from
'/user/hive/warehouse/export/student'
;

insert overwrite local directory 'opt/data/hive/student'

select
*from student;

insert overwrite local directory '/opt/data/student'

row format delimited fields
terminated
by','
select
*from student

insert overwrite  directory '/opt/data/student'

row format delimited fields
terminated
by','
select
*from student

bin/hive -e 'select * from de****t.student;' > /opt/data/student.txt;

export table

default
.student to
'/data/student'
;

truncate

table student;

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Hive DML資料操作之資料匯出

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MySQL 之 資料的匯出與匯入

mysql中你可以使用select.into outfile語句來簡單的匯出資料到文字檔案上。並且可以通過命令選項來設定資料輸出的指定格式。語法 select from 表名 into outfile 文字檔案 例子 select from test into outfile back test.t...