MySQL 'AND' 查询连接表

Question

我有如下 2 个 MySQL 表；

下面的查询为我提供了具有

tagId

1450

OR

1451 的所有产品。 我的问题是；我需要找到具有

tagId

1450

AND

1451 的产品。正确的方法是什么？

SELECT * FROM products AS PROD
LEFT JOIN product_tags AS PTAG ON PTAG.productGuid = PROD.productGuid

WHERE PTAG.tagId IN (1450, 1451)

---

CREATE TABLE `products` (
  `productGuid` varchar(36) NOT NULL,
  `productName` longtext NOT NULL,
  PRIMARY KEY (`productGuid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;


CREATE TABLE `product_tags` (
  `productGuid` varchar(36) NOT NULL,
  `tagId` int NOT NULL,
  `id` int NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`id`),
  KEY `idx_productGuid` (`productGuid`),
  KEY `idx_tagId` (`tagId`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

Answer 1

我以前尝试过类似的方法，希望这有帮助！

SELECT * 
FROM 
    products AS PROD
LEFT JOIN 
    (select productGuid from product_tags pt 
    where pt.tagId=1450 
    and 1=(select distinct 1 from product_tags where pt.productGuid=productGuid and tagId=1451) 
    )AS PTAG 
ON PTAG.productGuid = PROD.productGuid;