关于sql server：连接两个表的订单值的SQL总和

SQL sum of order value from joining two tables

我想从另一个表中获取每个订单的销售额总和，以及客户和员工的详细信息

订单明细表

1
2
3
4
5
6

OrderID ProductID UnitPrice Quantity Discount
10248 11 10 1 0
10248 42 20 2 0
10248 72 20 3 0
10249 14 10 1 0
10249 51 40 2 0

订单表

1
2
3

OrderID CustomerName EmployeeName
10248 C1 E1
10249 C2 E2

想要的结果

1
2
3

orderid sales Customer Employee
10248 110 C1 E1
10249 90 C2 E2

所以我需要每个订单的总销售额(例如 10248 个订单的销售额为 10*1 20*2 20*3 = 10 40 60=110)以及相应的员工姓名和客户姓名

查询已尝试

1
2
3
4

SELECT od.orderid, Unitprice * Quantity AS sales
GROUP BY od.orderid
FROM [ORDER Details] od
INNER JOIN orders o ON od.orderid = o.orderid

错误：

Incorrect syntax near the keyword 'From'.

需要按订单聚合，然后取每个订单的销售额之和：

1
2
3
4
5
6
7
8

SELECT
od.orderid,
SUM(Unitprice * Quantity) AS sales
FROM [ORDER Details] od
INNER JOIN orders o
ON od.orderid = o.orderid
GROUP BY
od.orderid;

from 属于 group by.

之前

1
2
3

SELECT od.orderid, unitprice * quantity AS sales
FROM [ORDER Details] od
GROUP BY od.orderid;

加入订单信息：

1
2
3
4
5
6
7
8
9

SELECT o.orderid, od.sales, o.customername, o.employeename
FROM orders o
JOIN
(
SELECT orderid, unitprice * quantity AS sales
FROM [ORDER Details]
GROUP BY orderid
) od ON od.orderid = o.orderid
ORDER BY o.orderid;