使用多个条件过滤 EAV 表

Question

我有 2 张桌子：

桌子objects：

object_id | object_group_id

桌子attributes：

attr_id | attr_object_id | attr_property_id | attr_value

现在，我想获取所有object_id位置object_group_id = 1并过滤两个属性：

(attr_property_id = 1 AND attr_value <= '100000')
   AND 
(attr_property_id = 2 AND attr_value > '2000')

我试图构建一些查询，如下所示：

SELECT * FROM objects as o

/* filter1 join */
INNER JOIN 
    attributes AS f1 
        ON 
    o.object_id = f1.attr_object_id 
        AND 
    f1.attr_property_id = 1

/* filter2 join */
INNER JOIN 
    attributes AS f2 
        ON 
    f1.attr_object_id = f2.attr_object_id 
        AND 
    f2.attr_property_id = 2

WHERE 
    o.object_group_id = 1
       AND
   f1.attr_value <= '100000'
       AND
   f2.attr_value > '2000'

...但仍然无法得到我需要的东西。

Answer 1

经过几个小时的组合和尝试，我终于做到了：

    SELECT * FROM objects as o

/* filter1 join */
INNER JOIN 
    attributes AS f1 
        ON 
    o.object_id = f1.attr_object_id 
        AND 
    f1.attr_property_id = 1
        AND
    f1.attr_value <= '100000'

/* filter2 join */
INNER JOIN 
    attributes AS f2 
        ON 
    f1.attr_object_id = f2.attr_object_id 
        AND 
    f2.attr_property_id = 2
        AND
    f2.attr_value > '2000'

WHERE 
    o.object_group_id = 1

我太接近了，并通过将所有过滤条件移至 来完成此操作INNER JOIN。