How to find frequency of a variable over multiple columns in hive?

Question

I have data regarding gender of people under 8 columns:

mem1;mem2;mem3;mem4;mem5;mem6;mem7;mem8
MALE;FMALE;UNKN;MALE;FMALE;FMALE;MALE;MALE

Now I want to find out the frequency of male, fmale, unkn using hive. Something like

MALE 4
FMALE 3
UNKN 1

I'm new to Hive but I know we need to use group by. Can someone please help me with the query?

Answer 1

使用Hive Reflect获取计数。

1. 创建整行作为一列的表

2. 使用Hive Reflection计算列上的出现次数。实施例

  

选择反映（＆＃34; org.apache.commons.lang.StringUtils＆＃34;，＆＃34; countMatches＆＃34;，   ＆＃34; MALE; FMALE; UNKN; MALE; FMALE; FMALE;男性;男性＆＃34;，＆＃34;男性＆＃34;）作为男性，   反映（＆＃34; org.apache.commons.lang.StringUtils＆＃34;，＆＃34; countMatches＆＃34;，   ＆＃34; MALE; FMALE; UNKN; MALE; FMALE; FMALE;男性;男性＆＃34;，＆＃34;女性＆＃34;）女性   来自mytable