Hive hive表中載入資料

五種情況

create table score3 like score;

insert into table score3 partition(month =

'201807'
) values (
'001','002','100'
);

load data local inpath '/export/servers/hivedatas/score.csv' overwrite into table score partition(month=

'201806'
);

create table score4 like score;

insert overwrite table score4 partition(month =

'201806'
)select s_id,c_id,s_score from score;

常用於實際生產環境當中，將一張表拆開成兩部分或者多部分

給score表載入資料

load data local inpath '/export/servers/hivedatas/score.csv' overwrite into table score partition(month=

'201806'
);

create table score_first( s_id string,c_id  string) partitioned by (month string) row format delimited fields terminated by '\t'

;

create table score_second(c_id string,s_score int) partitioned by (month string) row format delimited fields terminated by '\t'

;

from score 

insert overwrite table score_first partition(month=
'201806'
)select s_id,c_id 
insert overwrite table score_second partition(month =
'201806'
)select c_id,s_score;

create table score5 as select * from score;

create external table score6 (s_id string,c_id string,s_score int) row format delimited fields terminated by '\t' location '/myscore6'

;

hdfs dfs -mkdir -p /myscore6

hdfs dfs -put score.csv /myscore6;

select * from score6;

create table techer2 like techer;

export table techer to  '/export/techer'
;import table techer2 from '/export/techer'
;

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