EAV表到平台

Question

说我有一张eav这样的表SQL Fiddle）：

| Person_ID | PAttribute_ID | Value         |
| 1         | 1             | Flat Street 1 |
| 1         | 2             | 634-5789      |

并且想要创建一个将所有属性作为平面表返回的查询（例如，导出到电子表格）

除了手动连接所有属性之外，还有更好的方法吗？像这样：

SELECT id , address.Value AS adressV, telephone.Value as telephoneV
FROM person
LEFT JOIN eav AS address ON address.Person_ID = person.id AND address.PAttribute_ID = 1
LEFT JOIN eav AS telephone ON telephone.Person_ID = person.id AND telephone.PAttribute_ID = 2;

有2个属性可行，有50个属性，你会得到一个不可理解的查询。