Mysql 通过连接3个表来更新表

我有三张桌子：

TBL产品专业Id、数量、单价 tblorderdetails订单id、专业id、数量 t主订单号，总金额 我打算将这些表连接到as，以更新tblorder表中的总额。这是我使用MySql控制台的查询：

UPDATE o
SET o.totalAmount = p.unitprice * d.qty
FROM tblorder o INNER JOIN tblorderdetails d
on o.order_id = d.order_id
INNER JOIN tblproduct p
on p.pro_Id = d.pro_Id;

这是我得到的错误：

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near 'from tblorder o inner join tblorderdetails d

---

语法不正确，应如下所示

UPDATE  tblorder o
INNER JOIN tblorderdetails d
on o.order_id = d.order_id
INNER JOIN tblproduct p
on p.pro_Id = d.pro_Id
SET o.totalAmount = p.unitprice * d.qty ;