mysql - 使用 sum 和 where

Question

我正在尝试计算客户所有购买的总和。

我有一个包含所有购买的表(客户 ID、商品 ID、金额)、一个客户表(客户 ID、姓名、地址)和商品表(ID、价格)。

这是我目前最好的尝试，但我在如何使用 group by 时遇到了错误(这本身就很奇怪)。

    SELECT name,address 
    FROM (purchases as p join customer as c on p.customerID = c.customerID
    join item as i on p.ean = i.ean)
    where sum(i.outprice * p.amount) >2500
    group by p.customerID;

下面的查询完美运行。但我想做的只是展示在哪里 sum(i.outprice * p.amount) > X 对于任何给定的 X。

    SELECT name,address,sum(i.outprice * p.amount)
    FROM (purchases as p join customer as c on p.customerID = c.customerID
    join item as i on p.ean = i.ean)
    group by p.customerID;

我应该怎样做呢？

谢谢!

Answer 1

SELECT name,address 
    FROM (purchases as p join customer as c on p.customerID = c.customerID
    join item as i on p.ean = i.ean)
    group by p.customerID
having sum(i.outprice * p.amount) >2500