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(
if(course is null, 0, length(course) - length(replace(course, ',', '')) + 1)
) staff_nums
from
cultivate_tb
统计所有课程参加培训人次
https://www.nowcoder.com/practice/98aad5807cf34a3b960cc8a70ce03f53
select
sum(
if(course is null, 0, length(course) - length(replace(course, ',', '')) + 1)
) staff_nums
from
cultivate_tb
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