查询错误:无法识别谓词"组".失败的规则:子查询源中的"标识符"

Question

我在hive中尝试了以下查询.我收到错误"无法识别谓词'组'.失败的规则:子查询源中的'标识符'".

根据我的理解,我不确定该错误在下面的查询中意味着什么.任何建议都会很棒!!

select val1, val2, count(distinct(val3)) from (
    select val1, val2, val3
    from tab1
    where (val1 in ('A', 'B') 
    or val2 in ('C', 'D')))
group by val1, val2

Answer 1

您必须为子查询设置别名:

select val1, val2, count(distinct(val3)) from (
    select val1, val2, val3
    from tab1
    where (val1 in ('A', 'B') 
    or val2 in ('C', 'D'))) as t
group by val1, val2