Hive默认情况下查询结果里面是只显示值：
hive> select * from click_log; OK 11 ad_101 2014-05-01 06:01:12.334+01 22 ad_102 2014-05-01 07:28:12.342+01 33 ad_103 2014-05-01 07:50:12.33+01 11 ad_104 2014-05-01 09:27:12.33+01 22 ad_103 2014-05-01 09:03:12.324+01 33 ad_102 2014-05-02 19:10:12.343+01 11 ad_101 2014-05-02 09:07:12.344+01 35 ad_105 2014-05-03 11:07:12.339+01 22 ad_104 2014-05-03 12:59:12.743+01 77 ad_103 2014-05-03 18:04:12.355+01 99 ad_102 2014-05-04 00:36:39.713+01 33 ad_101 2014-05-04 19:10:12.343+01 11 ad_101 2014-05-05 09:07:12.344+01 35 ad_102 2014-05-05 11:07:12.339+01 22 ad_103 2014-05-05 12:59:12.743+01 77 ad_104 2014-05-05 18:04:12.355+01 99 ad_105 2014-05-05 20:36:39.713+01
而并不知道每列的字段是什么，通过如下命令设置之后，可以看到每列的字段信息：
hive> set hive.cli.print.header=true; hive> set hive.cli.print.row.to.vertical=true; hive> set hive.cli.print.row.to.vertical.num=1;
再次执行查询，查看查询结果：
hive> select * from click_log; OK cookie_id ad_id ts 11 ad_101 2014-05-01 06:01:12.334+01 22 ad_102 2014-05-01 07:28:12.342+01 33 ad_103 2014-05-01 07:50:12.33+01 11 ad_104 2014-05-01 09:27:12.33+01 22 ad_103 2014-05-01 09:03:12.324+01 33 ad_102 2014-05-02 19:10:12.343+01 11 ad_101 2014-05-02 09:07:12.344+01 35 ad_105 2014-05-03 11:07:12.339+01 22 ad_104 2014-05-03 12:59:12.743+01 77 ad_103 2014-05-03 18:04:12.355+01 99 ad_102 2014-05-04 00:36:39.713+01 33 ad_101 2014-05-04 19:10:12.343+01 11 ad_101 2014-05-05 09:07:12.344+01 35 ad_102 2014-05-05 11:07:12.339+01 22 ad_103 2014-05-05 12:59:12.743+01 77 ad_104 2014-05-05 18:04:12.355+01 99 ad_105 2014-05-05 20:36:39.713+01
