1、表结构及插入数据
DROP TABLE IF EXISTS `listings`;
CREATE TABLE `listings` (
`store_id` int(11) DEFAULT NULL,
`id` int(11) NOT NULL AUTO_INCREMENT,
`product_id` int(11) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
LOCK TABLES `listings` WRITE;
/*!40000 ALTER TABLE `listings` DISABLE KEYS */;
INSERT INTO `listings` (`store_id`, `id`, `product_id`)
VALUES
(3,1,1),
(3,2,2),
(3,3,1),
(3,4,1),
(3,5,2);
/*!40000 ALTER TABLE `listings` ENABLE KEYS */;
UNLOCK TABLES;
2、查看表数据
select product_id, store_id, id from listings;
表中数据
3、查询store id 为3，product_id 分别为1和2里ID最大的行数据
select product_id,store_id,max(id) id from listings where product_id in (1,2) and store_id = 3 group by product_id;
查询结果
