1

我有一个 sql 表，它有 2 列用户 ID 和产品，用户 ID 是唯一的，而产品将有 3 个值 [0,1,-1] -1 代表没有购买产品，1 代表当前正在使用的产品，而 0 代表产品已经用过的。

我想要的是对表
产品中使用的总用户的百分比查询（％）：？
目前使用的产品（%）： ?
产品未售出（%）：？

任何建议或帮助将不胜感激谢谢

在此处输入图像描述
到目前为止我尝试了什么？

Select count(userId) * 100 / (select count(products) Where products = 1) AS perc 
from product group by userid
4

4 回答 4

4

试试这个：

SELECT SUM(CASE WHEN products = 1 THEN 1 ELSE 0 END) * 100   /
Count(DISTINCT Products.UserID) AS 'Currently used products%',
SUM(CASE WHEN products = 0 THEN 1 ELSE 0 END) * 100   /
Count(DISTINCT Products.UserID) As 'Used products%',
SUM(CASE WHEN products = -1 THEN 1 ELSE 0 END) * 100   /
Count(DISTINCT Products.UserID) AS 'Not sold products%'
FROM Products
于 2012-09-10T15:29:17.823 回答
1 
SELECT SUM(CASE WHEN Products = 1 THEN 1 ELSE 0 END) * 100 
       / COUNT(DISTINCT UserID) AS product_currently_in_use_pct
     , SUM(CASE WHEN Products = 0 THEN 1 ELSE 0 END) * 100 
        / COUNT(DISTINCT UserID) AS product_used_pct
     , SUM(CASE WHEN Products = -1 THEN 1 ELSE 0 END) * 100 
       / COUNT(DISTINCT UserID) AS product_not_sold_pct
  FROM MyTable
于 2012-09-10T15:48:43.457 回答
0 
SELECT products,
(convert(numeric(5,2),count(products))/(SELECT convert(numeric(5,2),count(products)) FROM product)) * 100
AS "Percentage"
FROM product GROUP BY products
于 2012-09-10T15:45:59.400 回答
0

你也可以这样试试。

小提琴

select count(*) total
,count(p1.products)/count(*)*100 as currentlyused
,count(p2.products)/count(*)*100 as used
,count(p3.products)/count(*)*100 as not_sold

from products p
left join products p1 on p1.products=1 and p1.id=p.id
left join products p2 on p2.products=0 and p2.id=p.id
left join products p3 on p3.products=-1  and p3.id=p.id
于 2012-09-10T16:04:50.990 回答