Question

我需要像这样执行查询

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

在 Hive 中，此查询失败：在表的其他字段中找不到字段 myUnusualField。

这是否意味着为了按 Hive 中的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

？

Answer 1

尝试重复表达式：

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

Hive：按计算列分组

1 个答案: