题解 | #牛客直播转换率#
牛客直播转换率
https://www.nowcoder.com/practice/73bf143cfc7f452a8569c6d7eca380f9
select course_id, course_name, round(sum(if_sign)/sum(if_vw)*100, 2) as 'sign_rate(%)'
from (
select a.course_id, b.course_name, a.if_vw, a.if_sign
from behavior_tb as a
left join course_tb as b
on a.course_id = b.course_id
) as c
group by course_id, course_name
order by course_id;
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