为什么我在配置单元中执行分组时出错？

Question

我正在配置单元中执行以下命令：

Select child.data_volume_gprs_dl + child.data_volume_gprs_ul as data_usage,
       parent.file_name,
       parent.record_number
  from table1 as parent
  left join table2 child
    on parent.file_name = child.file_name
   and parent.record_number = child.record_number
 where parent.served_imsi like '310120%'
    or parent.served_imsi like '312530%'
   and parent.serving_node_plmn_id like '310260%'
   and parent.date_part = 20191201
 group by parent.file_name, parent.record_number

Error: Error while compiling statement: FAILED: SemanticException [Error 10025]: Line 1:7 Expression not in GROUP BY key 'data_volume_gprs_dl' (state=42000,code=10025)

为什么我会收到这个错误？

Answer 1

所有非聚合列都应在 GROUP BY 列表中，例如

 group by parent.file_name, parent.record_number,
          child.data_volume_gprs_dl, child.data_volume_gprs_ul

如果您只需要按 parent.file_name 和 parent.record_number 列进行分组，则可以应用聚合（sum()、avg()、count()）函数对于其余的列。甚至添加 sum(child.data_volume_gprs_dl + child.data_volume_gprs_ul) 也是可能的。

为什么我在配置单元中执行分组时出错？

Why I am getting error while performing group by in hive?

sql

hive

hiveql