mysql散记 2018
ecshop 查询订单商品表：select rec_id,goods_name,group_concat(goods_number order by goods_number desc) from ecs_order_goods group by goods_id;
得到结果：
这个主要是看group_concat 和 group by 的用法
ecshop 查询 订单商品表 直接返回 销量总和：
select rec_id,goods_name,sum(goods_number) as numb from ecs_order_goods group by goods_id order by numb desc;
结果为：
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