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 like '%course1%',1,0))+sum(if(course like '%course2%',1,0))+sum(if(course like '%course3%',1,0)) 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 like '%course1%',1,0))+sum(if(course like '%course2%',1,0))+sum(if(course like '%course3%',1,0)) staff_nums from cultivate_tb
相关推荐