Question

我试图计算客户购买的所有商品的总和。

我有一张包含所有购买的表（CustomerID，ItemID，Amount），一张客户表（CustomerID，Name，Address）和Item（ID，price）。

这是我目前最好的尝试，但是我对于如何使用group by感到错误（这对我来说很奇怪）。

    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;

以下查询完美无缺。但我所要做的就是只展示在哪里 sum（i.outprice * p.amount）＆gt; X代表任何给定的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;

我该怎么做呢？

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

使用sum和where

1 个答案: