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--   3 root 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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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...