从数据库中选择行和总结/组

Question

我目前正在为此SQL语句的逻辑而苦苦挣扎。

我有一个表中包含列：

Country, Customer, Year, Product Purchased(5 different products) and Revenue. 

我期待写，通过国家，客户名称拉select语句，每个购买的产品，收入各产品在客户中每年。

SELECT Country, Customer, Year, Product, Revenue 
FROM table 
GROUP BY Country, Customer, Year, Product Purchased, Revenue 

国家的客户年产品收入总收入 英格兰客户A 2017年A产品100 200 英格兰客户A 2017年产品B 100 200 英格兰客户了2016产品A 100 100 谁能帮助吗？

Answer 1

SELECT sum(Revenue), Country, Customer, Year, Product 
FROM table 
GROUP BY Country, Customer, Year, Product 

Live demo to illustrate the result

Answer 2

SELECT SUM(Revenue),Country, Customer, YEAR, Product 
FROM TABLE 
GROUP BY Country, Customer, YEAR, Product Purchased