leetcode1083. 销售分析 II（SQL必会呀）

问题描述：

Table: Product

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| seller_id   | int     |
| product_id | int     |
| buyer_id    | int     |
| sale_date   | date    |
| quantity    | int     |
| price       | int     |
+------ ------+---------+
这个表没有主键，它可以有重复的行.
product_id 是 Product 表的外键.
编写一个 SQL 查询，查询购买了 S8 手机却没有购买 iPhone 的买家。注意这里 S8 和 iPhone 是 Product 表中的产品。

查询结果格式如下图表示：

Product table:
+------------+--------------+------------+
| product_id | product_name | unit_price |
+------------+--------------+------------+
| 1          | S8           | 1000       |
| 2          | G4           | 800        |
| 3          | iPhone       | 1400       |
+------------+--------------+------------+

Sales table:
+-----------+------------+----------+------------+----------+-------+
| seller_id | product_id | buyer_id | sale_date | quantity | price |
+-----------+------------+----------+------------+----------+-------+
| 1         | 1          | 1        | 2019-01-21 | 2        | 2000 |
| 1         | 2          | 2        | 2019-02-17 | 1        | 800   |
| 2         | 1          | 3        | 2019-06-02 | 1        | 800   |
| 3         | 3          | 3        | 2019-05-13 | 2        | 2800 |
+-----------+------------+----------+------------+----------+-------+

Result table:
+-------------+
| buyer_id |
+-------------+
| 1 |
+-------------+

上sql，拿去即可运行：

sale表：

/*Navicat Premium Data TransferSource Server         : 我的mysqlSource Server Type    : MySQLSource Server Version : 50736Source Host           : 8.136.255.28:3306Source Schema         : testTarget Server Type    : MySQLTarget Server Version : 50736File Encoding         : 65001Date: 12/01/2022 18:16:33
*/SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;-- ----------------------------
-- Table structure for sales
-- ----------------------------
DROP TABLE IF EXISTS `sales`;
CREATE TABLE `sales`  (`id` int(10) NOT NULL AUTO_INCREMENT,`seller_id` int(10) DEFAULT NULL,`product_id` int(10) DEFAULT NULL,`buyer_id` int(10) DEFAULT NULL,`sale_date` datetime(0) DEFAULT NULL,`quantity` int(255) DEFAULT NULL,`price` int(10) DEFAULT NULL,PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 5 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;-- ----------------------------
-- Records of sales
-- ----------------------------
INSERT INTO `sales` VALUES (1, 1, 1, 1, '2022-01-12 17:54:54', 2, 2000);
INSERT INTO `sales` VALUES (2, 1, 2, 2, '2022-01-12 17:54:57', 1, 800);
INSERT INTO `sales` VALUES (3, 2, 1, 3, '2022-01-12 17:54:59', 1, 800);
INSERT INTO `sales` VALUES (4, 3, 3, 3, '2022-01-12 17:55:01', 2, 2800);SET FOREIGN_KEY_CHECKS = 1;

product表：

/*Navicat Premium Data TransferSource Server         : 我的mysqlSource Server Type    : MySQLSource Server Version : 50736Source Host           : 8.136.255.28:3306Source Schema         : testTarget Server Type    : MySQLTarget Server Version : 50736File Encoding         : 65001Date: 12/01/2022 18:16:42
*/SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;-- ----------------------------
-- Table structure for product
-- ----------------------------
DROP TABLE IF EXISTS `product`;
CREATE TABLE `product`  (`id` int(10) NOT NULL AUTO_INCREMENT,`product_id` int(10) DEFAULT NULL,`product_name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,`unit_price` int(10) DEFAULT NULL,PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 4 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;-- ----------------------------
-- Records of product
-- ----------------------------
INSERT INTO `product` VALUES (1, 1, 's8', 1000);
INSERT INTO `product` VALUES (2, 2, 'g4', 800);
INSERT INTO `product` VALUES (3, 3, 'iphone', 1400);SET FOREIGN_KEY_CHECKS = 1;

SELECTt.buyer_id
FROM( SELECT s.buyer_id FROM `sales` AS s WHERE s.product_id = ( SELECT product_id FROM `product` WHERE product_name = 's8' ) ) t
WHEREt.buyer_id NOT IN ( SELECT s.buyer_id FROM `sales` AS s WHERE s.product_id = ( SELECT product_id FROM `product` WHERE product_name = 'iphone' ) )

大佬的自动忽略，需要的cv运行一下，感受会不一样

我要刷100道算法题，第94道