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 round(sum(course_count),0) as staff_nums from( SELECT info_id, (CHAR_LENGTH(course) - CHAR_LENGTH(REPLACE(course, 'course', '')))/CHAR_LENGTH('course') AS course_count FROM cultivate_tb ) as t1