十分位分析 - 客户和收入，反之亦然答案

【问题标题】：Decile analysis - customer and revenue and vice versa十分位分析 - 客户和收入，反之亦然
【发布时间】：2019-01-16 11:36:58
【问题描述】：

我正在尝试生成显示两件事的分析。

客户及其收入的十分位数（或百分位数），以便我了解 10% 的客户数量产生的收入最多。
收入的十分位数：有多少客户产生 10% 的收入。

select yeardate, decile, sum(revenue) as revenue,  count(distinct(customername)) as cust_count
 from 
(
select yeardate,
customername,
ntile(10) over (order by sum(revenue) ) as decile,
sum(revenue) as revenue
from 
(select 
year(DateStamp) as yeardate ,
customername, 
sum(Sell) as revenue
from MarginListView
where reporttype = 'Invoice' and sell >0 and year(datestamp) = 2018
group by year(DateStamp), customername) d
group by yeardate, CustomerName) c
group by yeardate, decile
order by 1,2

我可以获得十分位数的客户数，但不能获得十分位数的收入......

使用 MS SQL 服务器 - 任何帮助表示赞赏。

【问题讨论】：

标签： sql sql-server percentile

【解决方案1】：

要获得产生 10% 收入的客户数量，请从累计收入开始：

select customername, sum(sell) as revenue,
       sum(sum(sell)) over (order by sum(sell) desc) as running_revenue
from MarginListView
where reporttype = 'Invoice' and sell > 0 and 
      year(datestamp) = 2018
group by customername;

要得到占10%的数字：

select count(*)
from (select customername, sum(sell) as revenue,
             sum(sum(sell)) over (order by sum(sell) desc) as running_revenue,
             sum(sum(sell)) over () as total_revenue
      from MarginListView
      where reporttype = 'Invoice' and sell > 0 and 
            year(datestamp) = 2018
      group by customername
     ) c
where running_revenue - revenue >= 0.1 * total_revenue;

【讨论】：

【解决方案2】：

Gordon - 感谢您的帮助....它确实让我到达了我需要的地方。

我就这样结束了……

select 
yeardate, customername, 
sell,
cast((round(sum(sum(revenue_sub_tot)) over (order by sum(revenue_sub_tot) asc),2,2)) as decimal (2,2)) as revenue_percentiles,
cast((round(sum(sum(revenue_sub_tot)) over (order by sum(revenue_sub_tot) asc),1,1)) as decimal (2,2)) as revenue_deciles
from (select year(datestamp) as yeardate,
             customername, 
			 sum(sell) as sell,
			 sum(sell)/sum(sum(sell)) over () as revenue_sub_tot
      from MarginListView
      where reporttype = 'Invoice' and sell > 0 
      group by year(datestamp), customername
     ) c
	 group by yeardate, customername, sell
order by 1,3

【讨论】：