Mysql 多对多表的问题

我有3张表，如下所示：

[Products table] 1 -> many [Ratings table] many < - 1 [Customers table]

但这并没有淘汰其他客户评级相同的产品。现在如果我有一台HP 550笔记本电脑，不同的客户对它进行了两次评级，

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此查询将只踢出@CustomerID评级的评级，而不会踢出第二个评级。有人能帮我吗？

所有未经@customer评级的产品：

select 
  p.ID,
  p.Name
from 
  products p 
where 
  p.ID not in 
  (select distinct ratings.productID from ratings 
   where ratings.customerID = @CustomerID)

select 
  p.ID,
  p.Name,
  r.*
from 
  products p 
inner join 
  ratings r on p.productID = r.ProductID
where 
  p.ID not in 
  (select distinct ratings.productID from ratings 
   where ratings.customerID = @CustomerID)

非@customer评级产品的所有评级：

select 
  p.ID,
  p.Name
from 
  products p 
where 
  p.ID not in 
  (select distinct ratings.productID from ratings 
   where ratings.customerID = @CustomerID)

select 
  p.ID,
  p.Name,
  r.*
from 
  products p 
inner join 
  ratings r on p.productID = r.ProductID
where 
  p.ID not in 
  (select distinct ratings.productID from ratings 
   where ratings.customerID = @CustomerID)

比如：

select p.*
from products p
where not exists (
    select 1 
    from ratings r
    where r.customerid = ?
      and r.productid = p.productid
)

如果您想用连接来表示这一点：

select p.*
from products p
left join ratings r
    on  r.customerid = ?
    and r.productid = p.productid
where r.productid is null

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像往常一样，考虑提供适当的DDL和/或SqLFIDLE连同期望的结果集。我不明白，你是什么意思？