分别显示每一列每一类的总数——SQL

Question

Where is a database like

gender	ssc_b
F	Central
F	Central
F	Other
M	Central
M	Other

I used the count and group by command but it shows:

gender	num_gender	ssc_b	num_ssc_b
F	2	Central	2
F	1	Other	1
M	1	Central	1
M	1	Other	1

I want the display the total number of each catagory in each column seperately, like

gender	num_gender	ssc_b	num_ssc_b
F	3	Central	3
M	2	Other	2

Answer 1

SELECT gender as key, count(*) as value
FROM <table>
GROUP BY gender
UNION ALL
SELECT ssc_b as key, count(*) as value
FROM <table>
GROUP BY ssc_b

Answer 2

Exactly for what you asked, the answer is

select a.gender, a.s, b.gender, b.s from 
(select ROW_NUMBER() OVER() AS num_row, gender, sum(num_gender) s from t group by gender) a 
outer join 
(select ROW_NUMBER() OVER() AS num_row, ssc_b, sum(num_ssc_b) s from t group by ssc_b) b 
on a.num_row=b.num_row

But maybe more logical would be to have the inner queries above as two separate queries.