Question

我创建了2个表：customers（table1）和orderss（table2）

在表1中，我创建了columns(id,name)，在表2中，我创建了columns(oid,customer_id,amount)。

接下来，我使用sum()函数获取特定客户的总金额，并使用count()获取特定客户订购的总订单数量，并使用group by分别显示

现在我不知道如何找到具有特定客户名称的最高订单。

这就是我的尝试：

select max(name) as aaa,max(tcount) as highorders
from
   ( SELECT name,sum(orderss.amount) AS tamount,count(orderss.oid) as tcount
     FROM customers
     INNER JOIN orderss ON customers.id=orderss.customer_id group by name
     having tamount > 50 and tcount >= 2
   ) as ho

Answer 1

使用order by

select max(name) as aaa,max(tcount) as highorders
from
   ( SELECT name,sum(orderss.amount) AS tamount,count(orderss.oid) as tcount
     FROM customers
     INNER JOIN orderss ON customers.id=orderss.customer_id group by name
     having tamount > 50 and tcount >= 2
   ) as ho
order by field_name DESC

（您可以通过将ASC替换为ASC来获得升序

如何显示最高订单数i，e在表（tcount）中，客户名称（名称）

1 个答案: