基于字段限制MySQL结果

我已经将表中的产品称为字段类型值可能是这些值中的任何一个1,2,3,4

现在，我想得到的结果如下

1. Group the results based on 'type'
2. And Limit the results for each group to 5.

如何实现这一点，目前我正在使用以下查询

SELECT 
  *,
  (
    (
      CASE
    WHEN product_title LIKE '%xyz%' 
    THEN 2 
    ELSE 0 
      END
    ) + (
      CASE
    WHEN product_description LIKE '%xyz%' 
    THEN 1 
    ELSE 0 
      END
    )
  ) AS relevance 
FROM
  Products 
WHERE (
    (
      product_title LIKE '%xyz%' 
      OR product_description LIKE '%xyz%'
    )
  ) 
  AND product_available = 1 
  AND product_deleted <> 1 
ORDER BY relevance DESC 

这里有一个简单的例子

SELECT 
 p.id, 
 p.type 
FROM 
 Products p
WHERE
 5 > (SELECT COUNT(id) from Products where id < p.id and type = p.type)

---

我已经为它创建了SQLFIDLE，

示例数据和所需输出在哪里？

SELECT 
 p.id, 
 p.type 
FROM 
 Products p
WHERE
 5 > (SELECT COUNT(id) from Products where id < p.id and type = p.type)