1:倒入數據到hive
hive> show databases;
OK
default
zhdc
Time taken: 0.833 seconds, Fetched: 2 row(s)
hive> use zhdc;
OK
Time taken: 0.049 seconds
hive> show tables;
OK
emp
Time taken: 0.071 seconds, Fetched: 1 row(s)
hive> LOAD DATA LOCAL INPATH '/home/hadoop/data/emp.txt' OVERWRITE INTO TABLE emp ;
Loading data to table zhdc.emp
Table zhdc.emp stats: [numFiles=1, numRows=0, totalSize=700, rawDataSize=0]
OK
Time taken: 1.852 seconds
hive> select * from emp;
OK
7369 SMITH CLERK 7902 1980-12-17 800.0 NULL 20
7499 ALLEN SALESMAN 7698 1981-2-20 1600.0 300.0 30
7521 WARD SALESMAN 7698 1981-2-22 1250.0 500.0 30
7566 JONES MANAGER 7839 1981-4-2 2975.0 NULL 20
7654 MARTIN SALESMAN 7698 1981-9-28 1250.0 1400.0 30
7698 BLAKE MANAGER 7839 1981-5-1 2850.0 NULL 30
7782 CLARK MANAGER 7839 1981-6-9 2450.0 NULL 10
7788 SCOTT ANALYST 7566 1987-4-19 3000.0 NULL 20
7839 KING PRESIDENT NULL 1981-11-17 5000.0 NULL 10
7844 TURNER SALESMAN 7698 1981-9-8 1500.0 0.0 30
7876 ADAMS CLERK 7788 1987-5-23 1100.0 NULL 20
7900 JAMES CLERK 7698 1981-12-3 950.0 NULL 30
7902 FORD ANALYST 7566 1981-12-3 3000.0 NULL 20
7934 MILLER CLERK 7782 1982-1-23 1300.0 NULL 10
8888 HIVE PROGRAM 7839 1988-1-23 10300.0 NULL NULL
Time taken: 0.456 seconds, Fetched: 15 row(s)
hive>
1:創建一張新表
create table dept(
deptno int,
dname string,
location string
) row format delimited fields terminated by '\t';
2:覆蓋導入
LOAD DATA LOCAL INPATH '/home/hadoop/data/dept.txt' OVERWRITE INTO TABLE dept;
3:追加導入
LOAD DATA LOCAL INPATH '/home/hadoop/data/dept.txt' INTO TABLE dept;
1:hive導出數據
[hadoop@localhost ~]$ mkdir -p /home/hadoop/tmp/d6/emptmp
INSERT OVERWRITE LOCAL DIRECTORY '/home/hadoop/tmp/d6/emptmp'
row format delimited fields terminated by ','
SELECT empno,ename FROM emp;
hive> INSERT OVERWRITE LOCAL DIRECTORY '/home/hadoop/tmp/d6/emptmp'
> row format delimited fields terminated by ','
> SELECT empno,ename FROM emp;
Query ID = hadoop_20190317085858_a09b8b20-f30c-4a18-9b57-21d500fe330d
Total jobs = 1
Launching Job 1 out of 1
Number of reduce tasks is set to 0 since there's no reduce operator
Starting Job = job_1552784260685_0001, Tracking URL = http://localhost:8088/proxy/application_1552784260685_0001/
Kill Command = /home/hadoop/app/hadoop-2.6.0-cdh5.7.0/bin/hadoop job -kill job_1552784260685_0001
Hadoop job information for Stage-1: number of mappers: 1; number of reducers: 0
2019-03-17 09:46:55,963 Stage-1 map = 0%, reduce = 0%
2019-03-17 09:47:01,517 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.91 sec
MapReduce Total cumulative CPU time: 910 msec
Ended Job = job_1552784260685_0001
Copying data to local directory /home/hadoop/tmp/d6/emptmp
MapReduce Jobs Launched:
Stage-Stage-1: Map: 1 Cumulative CPU: 0.91 sec HDFS Read: 3613 HDFS Write: 164 SUCCESS
Total MapReduce CPU Time Spent: 910 msec
OK
Time taken: 18.479 seconds
