私は同じ行にMySQLクエリ結果が必要です

Question

SELECT sum(case when (gender)=1 THEN 1 ELSE 0 END), 
     GROUP_CONCAT(sum(case when (gender)=2 THEN 1 ELSE 0 END) SEPARATOR ' ') as combine   
from family_member_tbl 
GROUP BY gender 

Answer 1

いいえ、あなたはそのようなグループ化機能をネストすることはできません。むしろ和を最初に得て、次に

select sum_1, sum_2, group_concat(sum_2) as combine 
from (
SELECT gender, 
     sum(case when gender = 1 THEN 1 ELSE 0 END) as sum_1, 
     sum(case when gender = 2 THEN 1 ELSE 0 END) as sum_2   
from family_member_tbl 
GROUP BY gender) xxx 
group by gender;