一个商品表有goods_id(主键),brand_id,class_id,model,需要查出brand...答:首先求出group by brand_id,class_id,model的所有数据,sql如下 select count(*) as nums,brand_id,class_id,model from goods group by brand_id,class_id,model;然后根据查询的sql语句遍历结果$res:然后根据求出的结果来查询具体的商品数据 foreach($res as $v){ wheres[]="( brand_id="...