采用ecshop助理以及后台批量导入功能，很容易引起商品属性值混乱，如果属性值重，以下方法可以很好的解决值唯一问题

在数据库中执行以下语句：

delete a

from `ecs_goods_attr` a

left join(select `goods_attr_id`,`attr_id` from `ecs_goods_attr` group by goods_id,attr_value) b

on a.`goods_attr_id` = b.`goods_attr_id`

and a.`attr_id` = b.`attr_id`

where b.`goods_attr_id` is null AND b.`attr_id` is null;