从 table 生成计数后需要在 Hive 中生成百分比列

Question

我创建了以下 HIVE table，这有助于确定源蜂巢 table 中个体的数量和类型。现在我需要从中创建进一步的百分比突破：

CREATE TABLE hh_member_type AS 
SELECT count(*) AS count ,
CASE WHEN (LEAD_HOUSEHLD_STATUS = 'D') THEN 'Deceased' 
     WHEN (LEAD_HOUSEHLD_STATUS = 'H') THEN 'Head' 
     WHEN (LEAD_HOUSEHLD_STATUS = 'P') THEN 'Aged Parent At Home' 
     WHEN (LEAD_HOUSEHLD_STATUS = 'U') THEN 'Unknown' 
     WHEN (LEAD_HOUSEHLD_STATUS = 'W') THEN 'Spouse' 
     WHEN (LEAD_HOUSEHLD_STATUS = 'Y') THEN 'Young Adult' ELSE 'NULL' 
 END AS HH_STATUS 
FROM ( 
SELECT  LEAD_HOUSEHLD_STATUS FROM customer 
UNION ALL SELECT MEM1_HH_STATUS FROM customer 
UNION ALL SELECT MEM2_HH_STATUS FROM customer 
UNION ALL SELECT MEM3_HH_STATUS FROM customer 
UNION ALL SELECT MEM4_HH_STATUS FROM customer 
UNION ALL SELECT MEM5_HH_STATUS FROM customer 
UNION ALL SELECT MEM6_HH_STATUS FROM customer 
UNION ALL SELECT MEM7_HH_STATUS FROM customer 
UNION ALL SELECT MEM8_HH_STATUS FROM customer)A 
WHERE LEAD_HOUSEHLD_STATUS IN ('H','D','P','U','W','Y') 
GROUP BY LEAD_HOUSEHLD_STATUS ;

以上代码的输出是这样的：

hive> select * from hh_member_type ;
OK
277 Deceased
20636   Head
3547    Aged Parent At Home
18926   Unknown
16184   Spouse
7082    Young Adult
Time taken: 0.195 seconds, Fetched: 6 row(s)

我尝试使用以下代码创建百分比突破，但没有获得所需的输出。任何建议都会很棒。

CREATE TABLE hh_member_percent AS 
SELECT a.hh_status,round(a.count/sum(a.count) * 100 ,2) 
  from hh_member_type a 
 group by a.count,a.hh_status ;

Answer 1

使用分析 sum()：

SELECT a.hh_status,round(a.count/sum(a.count) over() * 100 ,2) 
  from hh_member_type a 
;

从 table 生成计数后需要在 Hive 中生成百分比列

Need to generate percentage column in Hive after generating Count from the table

sql

hive

count

percentage

hiveql