每个国家每月的总销售额

Question

我的桌子上有SELLERS(Seller_ID, Country, Month, Sales)。我想写一个查询以提取总销售额，发生最低销售额的月份和发生最高销售额的月份（按国家/地区）。

更新：

样本数据：

预期输出：

谢谢

Answer 1

尝试此查询：

SELECT SELLER_ID,
       COUNTRY,
       SUM(Sales) AS TOTAL_SALES,
       (SELECT Month FROM SELLERS WHERE Sales = (SELECT MIN(Sales) from SELLERS WHERE Country = Outer_Table.Country) LIMIT 1) AS MONTH_MIN,
       (SELECT Month FROM SELLERS WHERE Sales = (SELECT MAX(Sales) from SELLERS WHERE Country = Outer_Table.Country) LIMIT 1) AS MONTH_MAX
FROM SELLERS AS Outer_Table
GROUP BY Outer_Table.Country
ORDER BY Outer_Table.Seller_ID

您可以将HERE与您发布的数据一起尝试。

Answer 2

像这样？首先计算SUM的销售额，然后找出哪个月份具有MIN和MAX的价值（按月和国家/地区）：

with ss as
  (select country, 
          month, 
          sum(sales) sum_sales
   from sellers
   group by country, month
  )
select country, 
       month, 
       min(sum_sales) min_sales, 
       max(sum_sales) max_sales
from ss
group by country, month
order by country, month;