ハイブのすべての列の合計を取る方法

Question

ハイブテーブルのすべての列の合計をとることは可能です。私は合計

表 COL COL_1 col_2 col_3

Ouptut 合計（COL）、合計（COL_1）、合計（col_2）合計（col_3）

Answer 1

create table mytable (i int,j int,k int); 
insert into mytable values (1,2,3),(4,5,6),(7,8,9); 

---

を取るために、任意の単一の方法を意味します

select  pos+1  as col 
      ,sum (val) as sum_col 

from  mytable t 
      lateral view posexplode(array(*)) pe 

group by pos 
; 

---

+-----+---------+ 
| col | sum_col | 
+-----+---------+ 
| 1 |  12 | 
| 2 |  15 | 
| 3 |  18 | 
+-----+---------+ 

または（だから、神は私を助けて）

select  map_values 
      (
       str_to_map 
       (
        concat_ws 
        (
         ',' 
         ,sort_array 
         (
          collect_list 
          (
           concat_ws 
           (
            ':' 
            ,lpad(cast(pos as string),10,'0') 
            ,cast(sum_val as string) 
           ) 
          ) 
         ) 
        ) 
       ) 
      )  as sum_col_array 

from  (select  pos 
         ,sum (val) as sum_val 

      from  mytable t 
         lateral view posexplode(array(*)) pe 

      group by pos 
      ) t 
; 

---

+------------------+ 
| sum_col_array | 
+------------------+ 
| ["12","15","18"] | 
+------------------+