hive在使用having count()是，不支持去重计数
hive (default)> select imei from t_test_phonenum where ds=20150701 group by imei having count(distinct phone_num)>1 limit 10;
FAILED: SemanticException [Error 10002]: Line 1:95 Invalid column reference 'phone_num'
hive (default)> select imei from t_test_phonenum where ds=20150701 group by imei having count(phone_num)>1 limit 10;
Total MapReduce jobs = 1
Launching Job 1 out of 1
Number of reduce tasks not specified. Estimated from input data size: 1
In order to change the average load for a reducer (in bytes):
set hive.exec.reducers.bytes.per.reducer=<number>
In order to limit the maximum number of reducers:
set hive.exec.reducers.max=<number>
In order to set a constant number of reducers:
set mapred.reduce.tasks=<number>
Starting Job = job_201503201830_2570778, Tracking URL = http://10-198-131-242:8080/jobdetails.jsp?jobid=job_201503201830_2570778
Kill Command = /data/home/hadoop-1.2.1/libexec/../bin/hadoop job -kill job_201503201830_2570778
Hadoop job information for Stage-1: number of mappers: 1; number of reducers: 1
2015-07-03 11:07:16,954 Stage-1 map = 0%, reduce = 0%
2015-07-03 11:07:33,530 Stage-1 map = 100%, reduce = 0%
2015-07-03 11:07:47,620 Stage-1 map = 100%, reduce = 33%, Cumulative CPU 14.32 sec
2015-07-03 11:07:55,742 Stage-1 map = 100%, reduce = 100%, Cumulative CPU 20.78 sec
MapReduce Total cumulative CPU time: 20 seconds 780 msec
Ended Job = job_201503201830_2570778
MapReduce Jobs Launched:
Job 0: Map: 1 Reduce: 1 Cumulative CPU: 20.78 sec HDFS Read: 17371199 HDFS Write: 98 SUCCESS
Total MapReduce CPU Time Spent: 20 seconds 780 msec
OK
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