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 round(sum(c.read_num)/sum(c.show_num),4) as fans_ctr from a join b on a.author_id = b.author_id join c on b.content_id = c.content_id where a.fans_id = c.fans_id;
最初没理解什么叫粉丝曝光和非粉丝曝光
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