Sql 接合

我正在尝试连接此表并连接另外两个表。
我的输出应该包含以下列：客户全名（名字和姓氏）、产品说明、订购数量

Table Name Customers:
CustomerId
FirstName 
Lastname
City 
State

---

假设客户id或产品id都不能为空，则进行内部联接

SELECT C.FirstName + ' ' + C.LastName AS [FullName],
       P.Description AS [ProductDescription],
       O.Quantity AS [QuantityOrdered]
  FROM Orders O
  JOIN Customers C
    ON C.CustomerId = O.CustomerId
  JOIN Products P
    ON P.ProductId = O.ProductId

Table: Products
ProductID
Description
Quantity

SELECT C.FirstName + ' ' + C.LastName AS [FullName],
       P.Description AS [ProductDescription],
       O.Quantity AS [QuantityOrdered]
  FROM Orders O
  JOIN Customers C
    ON C.CustomerId = O.CustomerId
  JOIN Products P
    ON P.ProductId = O.ProductId