题解 | #统计所有课程参加培训人次#
统计所有课程参加培训人次
https://www.nowcoder.com/practice/98aad5807cf34a3b960cc8a70ce03f53
select
sum(course_pv) staff_nums
from(
select
staff_id,
length(course) - length(replace(course, ',', '')) + 1 course_pv
from
cultivate_tb
where
course is not null
)t
