内部连接mysql连接3个表

我在使用3个表的内部联接时遇到问题

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我需要显示客户id、客户姓名和姓氏、产品名称只需在

产品
表中再添加一个
JOIN
，并包含一个
ORDER BY
子句：

SELECT   
   c.cust_id, 
   c.forename, 
   c.surname, 
   p.prod_name, 
   s.Date_of_sale
FROM customers c
    INNER JOIN sales s ON c.cust_id = s.cust_id
    INNER JOIN products p ON s.product_id = p.product_id
ORDER BY s.Date_of_sale DESC



我认为问题出在FROM参数中。
您只指定了客户

  SELECT customers.cust_id, customers.forename, customers.surname, products.prod_name,     sales.Date_of_sale
 FROM 
 customers , products , sales
 INNER JOIN 
 sales
 ON 
 customers.cust_id = sales.cust_id;

我收到错误#1066-非唯一表/别名：“sales”请帮助此操作无效我收到错误-->#1054-on子句中的未知列“s.product_id”
  SELECT customers.cust_id, customers.forename, customers.surname, products.prod_name,     sales.Date_of_sale
 FROM 
 customers , products , sales
 INNER JOIN 
 sales
 ON 
 customers.cust_id = sales.cust_id;