하이브 생성 테이블 오류.

Question

다음 표를 만들 때 발생하는 오류를 극복하도록 도와 줄 수 있습니까?

감사

CREATE TABLE RANGE_FT (HOSP_VAR STRING, RANGE INT) 
AS 
      SELECT 'EMR' ,MAX(emr_avg_score) - MIN(emr_avg_score) from JOIN9 
    UNION SELECT 'SCI' ,MAX(sci_avg_score) - MIN(sci_avg_score) from JOIN9 
    UNION SELECT 'ASTH' ,MAX(asth_avg_score) - MIN(asth_avg_score) from JOIN9 
    UNION SELECT 'HF' ,MAX(hf_avg_score) - MIN(hf_avg_score) from JOIN9 
    UNION SELECT 'SC' ,MAX(sc_avg_score) - MIN(sc_avg_score) from JOIN9 
    UNION SELECT 'PNEU' ,MAX(pneu_avg_score) - MIN(pneu_avg_score) from JOIN9 
    UNION SELECT 'PREV' ,MAX(prev_avg_score) - MIN(prev_avg_score) from JOIN9 
    UNION SELECT 'BC' ,MAX(BC_avg_score) - MIN(BC_avg_score) from JOIN9 
    UNION SELECT 'HEART' ,MAX(heart_avg_score) - MIN(heart_avg_score) from JOIN9 
    UNION SELECT 'PREG' ,MAX(preg_avg_score) - MIN(preg_avg_score) from JOIN9 
; 

라인 7 : ALL

Answer 1

1. UNION 'SELECT'에 빠진 6은 하이브 버전을 지원하지 않습니다 (그리고 당신이 필요도없는 이리).
   대신 UNION ALL을 사용하십시오. https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Union

2. UNION [ALL]에는 양쪽에서 동일한 스키마가 필요합니다.
   하이브에서는 다른 SQL 언어와 달리 형식이 비슷해야하며 별칭도 마찬가지입니다. https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Union

3. create 문에서 열 목록을 제공 할 수 없습니다.
   SELECT 절에 관련 별칭을 추가하십시오.

---

이것은 쿼리

CREATE TABLE RANGE_FT 
AS 
       SELECT 'EMR' as HOSP_VAR ,MAX (emr_avg_score) - MIN (emr_avg_score) as RANGE from JOIN9 
    UNION ALL SELECT 'SCI' as HOSP_VAR ,MAX (sci_avg_score) - MIN (sci_avg_score) as RANGE from JOIN9 
    UNION ALL SELECT 'ASTH' as HOSP_VAR ,MAX (asth_avg_score) - MIN (asth_avg_score) as RANGE from JOIN9 
    UNION ALL SELECT 'HF' as HOSP_VAR ,MAX (hf_avg_score) - MIN (hf_avg_score) as RANGE from JOIN9 
    UNION ALL SELECT 'SC' as HOSP_VAR ,MAX (sc_avg_score) - MIN (sc_avg_score) as RANGE from JOIN9 
    UNION ALL SELECT 'PNEU' as HOSP_VAR ,MAX (pneu_avg_score) - MIN (pneu_avg_score) as RANGE from JOIN9 
    UNION ALL SELECT 'PREV' as HOSP_VAR ,MAX (prev_avg_score) - MIN (prev_avg_score) as RANGE from JOIN9 
    UNION ALL SELECT 'BC' as HOSP_VAR ,MAX (BC_avg_score) - MIN (BC_avg_score) as RANGE from JOIN9 
    UNION ALL SELECT 'HEART' as HOSP_VAR ,MAX (heart_avg_score) - MIN (heart_avg_score) as RANGE from JOIN9 
    UNION ALL SELECT 'PREG' as HOSP_VAR ,MAX (preg_avg_score) - MIN (preg_avg_score) as RANGE from JOIN9 
; 

을 고정 된 버전입니다 그리고 여기이 작동 할 단 하나의 SELECT

create table RANGE_FT 
as 
select inline 
     (
      array 
      (
       struct ('EMR' ,MAX (emr_avg_score) - MIN (emr_avg_score) ) 
       ,struct ('SCI' ,MAX (sci_avg_score) - MIN (sci_avg_score) ) 
       ,struct ('ASTH' ,MAX (asth_avg_score) - MIN (asth_avg_score)) 
       ,struct ('HF' ,MAX (hf_avg_score) - MIN (hf_avg_score) ) 
       ,struct ('SC' ,MAX (sc_avg_score) - MIN (sc_avg_score) ) 
       ,struct ('PNEU' ,MAX (pneu_avg_score) - MIN (pneu_avg_score)) 
       ,struct ('PREV' ,MAX (prev_avg_score) - MIN (prev_avg_score)) 
       ,struct ('BC' ,MAX (BC_avg_score) - MIN (BC_avg_score) ) 
       ,struct ('HEART' ,MAX (heart_avg_score) - MIN (heart_avg_score)) 
       ,struct ('PREG' ,MAX (preg_avg_score) - MIN (preg_avg_score)) 
      ) 
     ) as (HOSP_VAR,RANGE) 

from JOIN9  
; 

Answer 2

와 대안 솔루션입니다 . Dudu에 의해 언급했듯이 열 이름 w를 줄 수 없습니다. 선택으로 hile writing 작성. 유니온을 사용할 수 있지만 성능에 현명한 UNION ALL이 더 좋습니다. 당신의 쓰임새에 따라 선택

CREATE TABLE RANGE_FT 
AS 
      SELECT 'EMR' AS HOSP_VAR ,MAX(emr_avg_score) - MIN(emr_avg_score) AS `RANGE` from JOIN9 
    UNION SELECT 'SCI' AS HOSP_VAR ,MAX(sci_avg_score) - MIN(sci_avg_score) AS `RANGE` from JOIN9 
    UNION SELECT 'ASTH' AS HOSP_VAR ,MAX(asth_avg_score) - MIN(asth_avg_score) AS `RANGE` from JOIN9 
    UNION SELECT 'HF' AS HOSP_VAR ,MAX(hf_avg_score) - MIN(hf_avg_score) AS `RANGE` from JOIN9 
    UNION SELECT 'SC' AS HOSP_VAR ,MAX(sc_avg_score) - MIN(sc_avg_score) AS `RANGE` from JOIN9 
    UNION SELECT 'PNEU' AS HOSP_VAR ,MAX(pneu_avg_score) - MIN(pneu_avg_score) AS `RANGE` from JOIN9 
    UNION SELECT 'PREV' AS HOSP_VAR ,MAX(prev_avg_score) - MIN(prev_avg_score) AS `RANGE` from JOIN9 
    UNION SELECT 'BC' AS HOSP_VAR ,MAX(BC_avg_score) - MIN(BC_avg_score) AS `RANGE` from JOIN9 
    UNION SELECT 'HEART' AS HOSP_VAR ,MAX(heart_avg_score) - MIN(heart_avg_score) AS `RANGE` from JOIN9 
    UNION SELECT 'PREG' AS HOSP_VAR ,MAX(preg_avg_score) - MIN(preg_avg_score) AS `RANGE` from JOIN9 
;