HIVE：查找運行總計

Question

我有一個叫做計劃表，有以下欄目：

 
ProgDate(Date) 
Episode(String) 
Impression_id(int) 
ProgName(String) 

我想找出每個日期和事件總的印象，對此我有以下查詢這是工作的罰款

Select progdate, episode, count(distinct impression_id) Impression from Program where progname='BBC' group by progdate, episode order by progdate, episode; 

 
Result: 
ProgDate  Episode  Impression  
20160919  1  5   
20160920  1  15   
20160921  1  10   
20160922  1  5   
20160923  2  25   
20160924  2  10   
20160925  2  25   

但我也想找出每一集的累計。我嘗試搜索如何查找總跑位數，但它將所有以前的總數加起來。 OVER（）

 
Date  Episode  Impression CumulativeImpressionsPerChannel  
20160919  1  5    5 
20160920  1  15    20 
20160921  1  10    30 
20160922  1  5    35 
20160923  2  25    25 
20160924  2  10    35 
20160925  2  25    60 

Answer 1

最近的蜂巢HQL支持版本的窗口分析功能（ref 1）（ref 2），包括SUM（）假設你有這樣的版本：我想每集運行總計，如下圖所示我曾經模仿使用PostgreSQL語法在SQL Fiddle

CREATE TABLE d 
    (ProgDate int, Episode int, Impression int) 
; 

INSERT INTO d 
    (ProgDate, Episode, Impression) 
VALUES 
    (20160919, 1, 5), 
    (20160920, 1, 15), 
    (20160921, 1, 10), 
    (20160922, 1, 5), 
    (20160923, 2, 25), 
    (20160924, 2, 10), 
    (20160925, 2, 25) 
; 

查詢1：

select 
     ProgDate, Episode, Impression 
    , sum(Impression) over(partition by Episode order by ProgDate) CumImpsPerChannel 
    , sum(Impression) over(order by ProgDate) CumOverall 
from (
     Select progdate, episode, count(distinct impression_id) Impression 
     from Program 
     where progname='BBC' 
     group by progdate, episode order by progdate, episode 
    ) d 

Results：

| progdate | episode | impression | cumimpsperchannel | 
|----------|---------|------------|-------------------| 
| 20160919 |  1 |   5 |     5 | 
| 20160920 |  1 |   15 |    20 | 
| 20160921 |  1 |   10 |    30 | 
| 20160922 |  1 |   5 |    35 | 
| 20160923 |  2 |   25 |    25 | 
| 20160924 |  2 |   10 |    35 | 
| 20160925 |  2 |   25 |    60 |