MySQL：查询一对多表？

Question

在下面的数据库设计中，采用一对多方法查询具有特定属性的产品的合适方法是什么？

我想我应该做以下事情： SELECT (*) FROM productProperties WHERE property = 'weight' AND value = '10'

但是，如果我需要在同一查询中同时权重= 10和颜色=蓝色的产品怎么办？

数据库设计示例：

表：产品

------------------------
id    | name     |  price
------------------------
0     | myName   |  100
1     | myName2  |  200

表：productProperties

------------------------------------------------
product  | property     |  Value
------------------------------------------------
0        | weight       |  10
1        | weight       |  20
1        | color        |  blue

Answer 1

如果我需要在同一查询中同时权重= 10和颜色=蓝色的产品怎么办？

一种选择：

select product, name
  from products inner join productProperties
    on (products.id = productProperties.product)
 where (property = 'weight' and value = '10')
    or (property = 'color' and value = 'blue')
 group by product, name
having count(1) = 2

子查询的另一种选择：

select id, name
  from products p
 where exists (
         select 1
           from productProperties pp1
          where p.id = pp1.product 
            and pp1.property = 'weight'
            and value = '10'
       )
   and exists (
         select 1
           from productProperties pp2
          where p.id = pp2.product 
            and pp2.property = 'color'
            and value = 'blue'
       )

Answer 2

SELECT * FROM productProperties p 
WHERE (SELECT COUNT(*) FROM productProperties p1 WHERE p1.product = p.product AND 
( (property = 'weight' AND value = '10') OR (property = 'color' AND value = 'blue') ) 
 =2