row_number分区结果错误

Question

我正在使用 ROW_NUMBER 按销售额对国家/地区进行排名。查询如下所示

SELECT country, SUM(sales) AS sales,
       ROW_NUMBER() OVER (PARTITION BY country ORDER BY SUM(sales) DESC) AS 'rank'
FROM table
GROUP BY country
ORDER BY sales DESC

出于某种原因，所有国家的排名都是一个。

Answer 1

如果按 COUNTRY 分区，则 row_number 重置为 1

SELECT country, 
       SUM(sales) AS sales, 
       ROW_NUMBER() OVER (ORDER BY SUM(sales) DESC) AS 'rank'
FROM table
GROUP BY country
ORDER BY sales DESC

row_number分区结果错误

row_number partition result wrong

sql

window-functions