hive (student)> create table if not exists course(
> stu_num string comment 'the number of a student',
> choose_course array<string> comment 'the choosing course of a student')
> row format delimited
> fields terminated by ':'
> collection items terminated by ',';
OK
Time taken: 0.698 seconds
hive (student)> show tables;
OK
course
student_test
Time taken: 0.051 seconds
hive (student)> describe course;
OK
stu_num string the number of a student
choose_course array<string> the choosing course of a student
Time taken: 0.139 seconds
hive (student)> load data local inpath '/home/landen/文档/choose_course.txt'
> overwrite into table course;
Copying data from file:/home/landen/文档/choose_course.txt
Copying file: file:/home/landen/文档/choose_course.txt
Loading data to table student.course
Deleted hdfs://localhost:9000/home/landen/UntarFile/hive-0.10.0/user/hive/warehouse/student.db/course
Table student.course stats: [num_partitions: 0, num_files: 1, num_rows: 0, total_size: 123, raw_data_size: 0]
OK
Time taken: 0.788 seconds
hive (student)> select * from course;
OK
1 ["English","Chinese","French","Japanese"]
2 ["Chinese","French"]
3 ["Chinese","French","Japanese"]
4 ["Chinese","French","India"]
5 ["Chinese","French","Green"]
Time taken: 0.231 seconds
hive (student)> select stu_num, choose_course[0] from course;
Total MapReduce 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_201303271617_0011, Tracking URL = http://localhost:50030/jobdetails.jsp?jobid=job_201303271617_0011
Kill Command = /home/landen/UntarFile/hadoop-1.0.4/libexec/../bin/hadoop job -kill job_201303271617_0011
Hadoop job information for Stage-1: number of mappers: 1; number of reducers: 0
2013-03-29 16:50:04,251 Stage-1 map = 0%, reduce = 0%
2013-03-29 16:50:10,313 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.78 sec
2013-03-29 16:50:11,324 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.78 sec
2013-03-29 16:50:12,329 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.78 sec
2013-03-29 16:50:13,334 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.78 sec
2013-03-29 16:50:14,338 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.78 sec
2013-03-29 16:50:15,342 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.78 sec
2013-03-29 16:50:16,346 Stage-1 map = 100%, reduce = 100%, Cumulative CPU 0.78 sec
MapReduce Total cumulative CPU time: 780 msec
Ended Job = job_201303271617_0011
MapReduce Jobs Launched:
Job 0: Map: 1 Cumulative CPU: 0.78 sec HDFS Read: 388 HDFS Write: 50 SUCCESS
Total MapReduce CPU Time Spent: 780 msec
OK
1 English
2 Chinese
3 Chinese
4 Chinese
5 Chinese
Time taken: 22.263 seconds
choose_course.txt内容如下：
1:English,Chinese,French,Japanese
2:Chinese,French
3:Chinese,French,Japanese
4:Chinese,French,India
5:Chinese,French,Green
