Question

如果我有一张包含以下内容的表格：

www.domain.com/test
www.domain.com/test/another-test
www.domain.com/test/another-test/new-level

如何返回每个国家/地区的百分比：

+---------+-------------+
| Country | campaign_id |
+---------+-------------+
| US      |           1 |
| FR      |           1 |
| FR      |           1 |
| UK      |           1 |
| NL      |           2 |
| DE      |           2 |
+---------+-------------+

这是我到目前为止的地方：

+---------+------------+
| Country | Percentage |
+---------+------------+
| US      | 25         |
| FR      | 50         |
| UK      | 25         |
+---------+------------+

请注意，如果更容易，则可以返回0.25。

Answer 1

编写子查询以获取广告系列中的总行数，然后将其划分为按国家/地区分组的行数。

SELECT a.country, ROUND(100 * COUNT(*)/b.total, 2) AS percentage
FROM yourTable AS a
CROSS JOIN (
  SELECT COUNT(*) AS total
  FROM yourTable
  WHERE campaign_id = 1) AS b
WHERE a.campaign_id = 1
GROUP BY a.country

DEMO

Answer 2

您已经给出了什么（看起来像是计算具有特定ID的国家/地区）：

SELECT country, ((COUNT(campaign_id)*100)/(SELECT SUM(campaign_id) FROM campaigns WHERE campaign_id = 1)) AS percent
FROM campaigns
WHERE campaign_id = 1
GROUP BY country

Answer 3

这是我的案例解决方案：

SELECT Country,
        (campaign_id/((select SUM(campaign_id) FROM table1 where campaign_id = 1))*100) as percentage
FROM tablename
WHERE campaign_id = 1
GROUP BY Country, campaign_id

使用MySQL的列组的百分比总数

3 个答案: