有没有办法计算百分比

Question

在这张图片中，

• 我想计算每个 header1 组的 header5 的出现次数。
• 另外我想知道header5中每次出现的百分比 对于 header1
中的每个元素

Answer 1

试试这个：

with cte_count as(
  SELECT header1 , count(header1) as total
  FROM tb_name
  group by header1
  ),

cte_sum as (

    SELECT header1, header5,count(header5) as ct
    FROM tb_name 
    group by header1, header5 
)

Select cte_sum.*, (cte_sum.ct*1.0*100 / cte_count.total) as percentage
From cte_sum left join cte_count
on cte_sum.header1 = cte_count.header1