| 2 | PC?Office | 2 |
| 3 | Appliances | 2 |
| 4 | Life Appliances | 2 |
| 5 | Tablet TV | 0 |
| 6 | Air Conditioner | 0 |
| 7 | Electrical Fan | 0 |
| 8 | Water Dispenser | 0 |
| 9 | Complete Machine | 3 |
| 10 | Accessory | 2 |
| 11 | Laptop | 0 |
| 12 | Ultrabook | 0 |
| 13 | Gamebook | 0 |
| 14 | CPU | 0 |
| 15 | Host Computer | 0 |
+---------+------------------+-------------+
----多表删除
基本思路也是通过一张表模拟多张表的操作
懒了，直接复制看吧，需要了再去做
-- INSERT ... SELECT实现复制
INSERT goods(goods_name,cate_id,brand_id) SELECT goods_name,cate_id,brand_id FROM goods WHERE goods_id IN (19,20);
-- 查找重复记录
SELECT goods_id,goods_name FROM goods GROUP BY goods_name HAVING count(goods_name) >= 2;
-- 删除重复记录
DELETE t1 FROM goods AS t1 LEFT JOIN (SELECT goods_id,goods_name FROM goods GROUP BY goods_name HAVING count(goods_name) >= 2 ) AS t2 ON t1.goods_name = t2.goods_name WHERE t1.goods_id > t2.goods_id;