Hive常用操作

1.1 建立表&建立文字檔案

create

table  fantj.t3(id int,name string,age int) row format delimited fields terminated by
','stored as textfile;

hive> create table  fantj.t3(id int,name string,age int) row format delimited fields terminated by ','stored as textfile;

oktime taken: 4.467 seconds
hive> select * from fantj.t3;
oktime taken: 2.82 seconds

建立文字檔案test.txt

我建立在/home/fantj目錄下。

1,jiao,18

2,fantj,20
3,laowang,30
4,laotie,40

load data local inpath '/home/fantj/test.txt' overwrite into table t3;

hive> load data

local inpath '/home/fantj/test.txt' overwrite into table fantj.t3;
loading data
to table fantj.t3
[warning]
could not update stats.
oktime taken: 26.334 seconds

hive> select * from fantj.t3;

ok1   jiao    18
2   fantj   20
3   laowang 30
4   laotie  40
time taken: 2.303 seconds, fetched: 4 row(s)

1.3 從hdfs匯入到hive

先將test檔案上傳到hdfs中

[root@s166 fantj]# hadoop fs -put test.txt /hdfs2hive

-rw-

r--r
--3root
supergroup
46/hdfs2hive/test
.txt

create

table  fantj.t5(id int,name string,age int) row format delimited fields terminated by
','stored as textfile;

hive> create table  fantj.t5(id int,name string,age int) row format delimited fields terminated by ','stored as textfile;

oktime taken: 3.214 seconds

load data inpath '/hdfs2hive/test.txt' overwrite into table fantj.t5;

hive> load data inpath '/hdfs2hive/test.txt' overwrite into table fantj.t5;

loading data
to table fantj.t5
[warning]
could not update stats.
oktime taken: 25.498 seconds

hive> select * from fantj.t5;

ok1   jiao    18
2   fantj   20
3   laowang 30
4   laotie  40
time taken: 5.046 seconds, fetched: 4 row(s)

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