hive: 按列分组计算

3lxsmp7m 于 2021-04-02 发布在 Hive

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我需要执行如下查询

select 
myUsualField, SOME_FUNCTION(myAnotherField) as myUnusualField 
from MYTABLE
group by 
myUsualField, myUnusualField

在hive中，这个查询失败了：在表中的其他字段中找不到字段myunusualfield。
这是否意味着为了在hive中用任何计算列进行分组，我必须使用子查询？

select * from (
    select 
    myUsualField, SOME_FUNCTION(myAnotherField) as myUnusualField 
    from MYTABLE
) sourceTable
    group by 
    myUsualField, myUnusualField

sql Hive group-by

来源：https://stackoverflow.com/questions/65415634/hive-group-by-calculated-column

1条答案

按热度按时间

6rqinv9w1#

select myUsualField, SOME_FUNCTION(myAnotherField) as myUnusualField 
from MYTABLE
group by myUsualField, SOME_FUNCTION(myAnotherField) ;

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hive: 按列分组计算

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