题解 | 请写出计算粉丝ctr的sql语句
请写出计算粉丝ctr的sql语句
https://www.nowcoder.com/practice/853a6567cf524f63bab0879b8d0bfe62
select sum(read_num)/sum(show_num) as fans_ctr from c join b using(content_id) where (fans_id,author_id) in (select fans_id,author_id from a)
从0开始的SQL之旅 文章被收录于专栏
从0开始的SQL之旅

