无法在配置单元 table 中使用 CTE 来编写查询

Question

   WITH month_revenue AS 
   (SELECT SUM(price) AS Oct_Revenue FROM attribute_partition WHERE event_type= 'purchase' AND 
   MONTH(event_time) = '10')  , 
   (SELECT SUM(price) AS Nov_Revenue FROM attribute_partition WHERE event_type= 'purchase' AND 
   MONTH(event_time) = '11')
   SELECT (Oct_Revenue - Nov_Revenue) FROM month_revenue ;

编写查询以查找从 10 月到 11 月由于购买而产生的收入变化。我得到的错误是：

FAILED: ParseException line 2:0 missing ( at 'SELECT' near ',' in statement line 2:117 missing ) at ',' near ',' in statement line 3:0 cannot recognize input near 'SELECT' 'SUM' '(' in statement

请帮助我了解我哪里做错了

Answer 1

一个 CTE 是一个查询。可以像这样在单个语句中计算两个月：

 WITH month_revenue AS 
   (SELECT 
         SUM(case when MONTH(event_time) = '10' then price else 0 end) AS Oct_Revenue,
         SUM(case when MONTH(event_time) = '11' then price else 0 end) AS Nov_Revenue
    FROM attribute_partition 
    WHERE event_type= 'purchase' 
      AND MONTH(event_time) in ('10', '11')
  )  

   SELECT (Oct_Revenue - Nov_Revenue) FROM month_revenue ;

无法在配置单元 table 中使用 CTE 来编写查询

Unable to use CTE in hive table to write a query

hive

common-table-expression

hiveql