SQL grouping/counting 字符串拆分函数

Question

好的，我的原创是这个

select people, count(*) 
from table
group by people

但有些人有多个人，因此此聚合不会为您提供 A、B、C 的纯计数，也不会为您提供每次迭代的计数

A 10
B 5
A, B 1
A, C 2
C 15
A, B, C 3

等等

这可以获取遗产中个人的完整列表 sql

select split(people,",") as person
from table

但是我不能在上面使用group by

select split(people,",") as person, count(*)
from table
group by person

给出错误

Cannot group by an aggregate.

我觉得解决方案是一个子查询，不知何故，但我不确定如何执行它

Answer 1

尝试用外部查询换行

select person, count(*)
from(
    select split(people,",") as person
    from table
) t
group by person

SQL grouping/counting on a string split function