sql - Hive从表中获取不同行的计数时引发错误

Question

我正在编写查询以获取Hive中不同行的计数。

select count(*)
from (select distinct 
        uid, 
        site,
        local_date,
        mktg_chnnl_name,
        mktg_sub_chnnl_name from customer_data)

但我不断收到此错误:

ParseException line 3:48 cannot recognize input near 'EOF' 'EOF' 'EOF' in subquery source

为什么会这样呢？

Answer 1

给您的子查询一个表别名:

select count(*)
from (select distinct uid, site, local_date, mktg_chnnl_name, mktg_sub_chnnl_name 
      from customer_data
     ) cd;