云南农业职业技术学院 - 互联网技术学院 - 美和易思《MYSQL 高级查询与编程》 综合机试试卷
数据库及试题文档下载:https://download.csdn.net/download/weixin_44893902/14503097
目录
(2)从表 t_customer 中,统计男性顾客数和女性顾客数,显示信息:性别 sex,人数 count;(注:将结果保存为视图,并将结果截图,视图和图片命名为 answer02);
(4)统计下过单的顾客的信息,显示信息为:顾客姓名 cus_name,电话 phone,性别 sex;(注:将结果保存为视图,并将结果截图,视图和图片命名为 answer04);
(9)写存储过程实现查询某个顾客的登录账号,存储过程需要传入顾客姓名,并且将查到的登录账号传出,并查询展示出来;(注:执行你所编写 sql 语句,检查结果,sql 保存命名为 answer09);
题目:电商平台 mysql 数据库系统管理
一、 语言和环境
1. 实现语言:sql。
2. 开发环境:mySql,navicat。
二、 题目(100 分)
1、需求场景:
今年来,由于国家各种扶持政策的推行,出现大批大学毕业生返乡创业的热潮。小王是云南某大学互联网学院计算机软件专业的在读大二学生,为了让自己所学能学以致用,他打算从现在就开始着手开发一个电商平台,考虑着毕业后能回到自己的家乡怒江地区,就地取材,将家乡各种特产销售到全国各地去。以下就是小王开发这个平台,设计的几个核心数据库表。
2、功能需求:
a、创建数据库,名称为 mall;
b、创建数据表 t_customer(顾客)、t_order(订单)、t_orderdetail(订单明细), t_goods(商品)表结构如下:
![](https://img-blog.csdnimg.cn/20210115205904360.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg5MzkwMg==,size_16,color_FFFFFF,t_70)
![](https://img-blog.csdnimg.cn/20210115205920362.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg5MzkwMg==,size_16,color_FFFFFF,t_70)
![](https://img-blog.csdnimg.cn/20210115212922657.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg5MzkwMg==,size_16,color_FFFFFF,t_70)
![](https://img-blog.csdnimg.cn/20210115210033341.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg5MzkwMg==,size_16,color_FFFFFF,t_70)
c、录入以下数据:
t_customer 表:
t_order 表:
t_goods 表:
t_orderdetail 表:
3、实现功能
(1)写更新语句,将 t_goods 表里的每个商品的单价增加 2 元;(注:执行你所编写 sql 语句,检查结果变化,sql 保存命名为 answer01,将更新前的数据截图保存命名为 answer01(old),更新后的数据截图命名为 answer02(new));
UPDATE t_goods SET price=price+2;
查询更新前后的数据:
SELECT * FROM t_goods;
恢复:
UPDATE t_goods SET price=price-2;
(2)从表 t_customer 中,统计男性顾客数和女性顾客数,显示信息:性别 sex,人数 count;(注:将结果保存为视图,并将结果截图,视图和图片命名为 answer02);
CREATE VIEW answer02 AS
SELECT sex 性别,COUNT(*) 人数 FROM t_customer GROUP BY sex;
(3)统计没有卖出过的商品的信息,按库存降序,单价升序排列,显示信息为:商品名 goods_name,单价 price,库存量 stock;(注:将结果保存为视图,并将结果截图,视图和图片命名为 answer03);
CREATE VIEW answer03 AS
SELECT goods_name 商品名,price 单价,stock 库存量
FROM t_goods WHERE goods_id NOT IN (SELECT goods_id FROM t_orderdtrail) ORDER BY price ASC;
(4)统计下过单的顾客的信息,显示信息为:顾客姓名 cus_name,电话 phone,性别 sex;(注:将结果保存为视图,并将结果截图,视图和图片命名为 answer04);
CREATE VIEW answer04 AS
SELECT cus_name 顾客姓名,phone 电话,sex 性别 FROM t_customer
WHERE cus_id IN (SELECT cus_id FROM t_order);
(5)写更新语句,更新 t_order 所有订单的 money 字段为订单的真实金额,订单状态改为已支付;(注:执行你所编写 sql 语句,检查结果变化,sql 保存命名为 answer05,将更新前的数据截图保存命名为 answer05(old),更新后的数据截图命名为 answer05(new));
查询更新前后数据:
SELECT * FROM t_order;
更新前:
更新后:
UPDATE t_order t1,(SELECT order_id,(g.price*goods_count) trueMoney FROM t_orderdtrail od,t_goods g
WHERE od.goods_id=g.goods_id) t2 SET t1.money=t2.trueMoney,t1.`status`=1 WHERE t1.order_id=t2.order_id;
恢复:
UPDATE t_order SET money=0,`status`=0
(6)从表 t_customer 和 t_order,统计每个顾客(包括下过单和没下过的顾客)的下单总金额和下单总数,显示信息为:顾客姓名,电话,下单总金额 allMoney,下单总数 order_num;(注:将结果保存为视图,并将结果截图,视图和图片命名为 answer06);
CREATE VIEW answer06 AS
SELECT cus_name 顾客姓名,phone 电话,SUM(price) 下单总金额,COUNT(o.order_id) 下单总数
FROM t_orderdtrail od,t_order o,t_customer c,t_goods g
WHERE o.order_id=od.order_id AND o.cus_id=c.cus_id AND od.goods_id=g.goods_id
GROUP BY cus_name;
(7)查询每个顾客的购物信息,显示信息:顾客姓名 cus_name,商品名 goods_name,购买次数 buy_count;(注:将结果保存为视图,并将结果截图,视图和图片命名为 answer07);
CREATE VIEW answer07 AS
SELECT cus_name 顾客姓名,goods_name 商品名称, COUNT(o.order_id) 购买次数
FROM t_orderdtrail od,t_order o,t_customer c,t_goods g
WHERE o.order_id=od.order_id AND o.cus_id=c.cus_id AND od.goods_id=g.goods_id
GROUP BY goods_name;
(8)为了保证删除订单时候,数据能保持一致性,对 t_order 表加触发器,在删除订单数据之后,触发删除订单明细表里的对应数据;(注:执行你所编写 sql 语句,检查结果变化,sql 保存命名为 answer08);
DROP TRIGGER IF EXISTS `answer08`;
delimiter $$
CREATE TRIGGER answer08
AFTER DELETE ON t_order
FOR EACH ROW
BEGIN
DELETE FROM t_orderdtrail WHERE t_orderdtrail.order_id=t_order.order_id;
END $$
delimiter ;
(9)写存储过程实现查询某个顾客的登录账号,存储过程需要传入顾客姓名,并且将查到的登录账号传出,并查询展示出来;(注:执行你所编写 sql 语句,检查结果,sql 保存命名为 answer09);
创建存储过程:
![](https://img-blog.csdnimg.cn/20210115212818629.png)
delimiter $$
CREATE PROCEDURE answer09(
IN name VARCHAR(20)
)
BEGIN
SELECT cus_name 顾客姓名,account 账号 FROM t_customer WHERE cus_name=name;
END
$$
delimiter ;
实现存储过程:
SET @name='王二';
CALL answer09(@name);
三、评分标准:
![](https://img-blog.csdnimg.cn/20210115212030276.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg5MzkwMg==,size_16,color_FFFFFF,t_70)
数据库完整导入代码:
/*
Navicat MySQL Data Transfer
Source Server : test
Source Server Version : 50646
Source Host : localhost:3306
Source Database : mall
Target Server Type : MYSQL
Target Server Version : 50646
File Encoding : 65001
Date: 2021-01-15 21:37:04
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for t_customer
-- ----------------------------
DROP TABLE IF EXISTS `t_customer`;
CREATE TABLE `t_customer` (
`cus_id` int(11) NOT NULL AUTO_INCREMENT,
`cus_name` varchar(20) CHARACTER SET utf8 NOT NULL,
`phone` varchar(15) NOT NULL,
`sex` char(1) CHARACTER SET utf8 DEFAULT NULL,
`account` varchar(20) NOT NULL,
`pwd` char(8) DEFAULT NULL,
PRIMARY KEY (`cus_id`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1;
-- ----------------------------
-- Records of t_customer
-- ----------------------------
INSERT INTO `t_customer` VALUES ('1', '张芮', '15908719999', '女', 'zhangrui', '12345678');
INSERT INTO `t_customer` VALUES ('2', '李四', '15908712222', '男', 'lisi', '12345678');
INSERT INTO `t_customer` VALUES ('3', '王二', '15908713333', '男', 'wanger', '12345678');
INSERT INTO `t_customer` VALUES ('4', '赵五', '15908714444', '男', 'zhaowu', '12345678');
INSERT INTO `t_customer` VALUES ('5', '李晓', '15908715555', '女', 'lixiao', '12345678');
-- ----------------------------
-- Table structure for t_goods
-- ----------------------------
DROP TABLE IF EXISTS `t_goods`;
CREATE TABLE `t_goods` (
`goods_id` int(11) NOT NULL AUTO_INCREMENT,
`goods_name` varchar(50) CHARACTER SET utf8 NOT NULL,
`price` decimal(8,2) DEFAULT NULL,
`unit` varchar(10) CHARACTER SET utf8 DEFAULT NULL,
`stock` int(11) DEFAULT '100',
PRIMARY KEY (`goods_id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=latin1;
-- ----------------------------
-- Records of t_goods
-- ----------------------------
INSERT INTO `t_goods` VALUES ('1', '土蜂蜜', '122.00', '公斤', '300');
INSERT INTO `t_goods` VALUES ('2', '野生干菌子', '152.00', '公斤', '50');
INSERT INTO `t_goods` VALUES ('3', '百香果', '14.50', '公斤', '100');
INSERT INTO `t_goods` VALUES ('4', '火腿肉', '99.00', '公斤', '60');
INSERT INTO `t_goods` VALUES ('5', '本地腐乳', '12.50', '瓶', '300');
INSERT INTO `t_goods` VALUES ('6', '腊肠', '147.00', '公斤', '300');
-- ----------------------------
-- Table structure for t_order
-- ----------------------------
DROP TABLE IF EXISTS `t_order`;
CREATE TABLE `t_order` (
`order_id` int(11) NOT NULL,
`cus_id` int(11) NOT NULL,
`number` char(6) NOT NULL,
`money` decimal(8,2) DEFAULT NULL,
`order_time` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
`status` char(1) CHARACTER SET utf8 DEFAULT NULL,
`remark` varchar(100) CHARACTER SET utf8 DEFAULT NULL,
PRIMARY KEY (`order_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
-- ----------------------------
-- Records of t_order
-- ----------------------------
INSERT INTO `t_order` VALUES ('1', '1', '000001', '0.00', '2021-01-15 21:36:56', '0', '');
INSERT INTO `t_order` VALUES ('2', '2', '000002', '0.00', '2021-01-15 21:36:56', '0', '');
INSERT INTO `t_order` VALUES ('3', '1', '000003', '0.00', '2021-01-15 21:36:56', '0', '');
INSERT INTO `t_order` VALUES ('4', '2', '000004', '0.00', '2021-01-15 21:36:56', '0', '');
INSERT INTO `t_order` VALUES ('5', '3', '000005', '0.00', '2021-01-15 21:36:56', '0', '');
INSERT INTO `t_order` VALUES ('6', '1', '000006', '0.00', '2021-01-15 21:36:56', '0', '请分装成两份');
INSERT INTO `t_order` VALUES ('7', '4', '000007', '0.00', '2021-01-15 21:36:56', '0', '请包装多加一层防护');
-- ----------------------------
-- Table structure for t_orderdtrail
-- ----------------------------
DROP TABLE IF EXISTS `t_orderdtrail`;
CREATE TABLE `t_orderdtrail` (
`order_id` int(11) NOT NULL,
`goods_id` int(11) NOT NULL,
`goods_count` int(11) DEFAULT '1',
`remark` varchar(100) CHARACTER SET utf8 DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
-- ----------------------------
-- Records of t_orderdtrail
-- ----------------------------
INSERT INTO `t_orderdtrail` VALUES ('1', '2', '2', '一公斤一袋分装');
INSERT INTO `t_orderdtrail` VALUES ('2', '1', '1', '');
INSERT INTO `t_orderdtrail` VALUES ('3', '2', '2', '一公斤一袋分装');
INSERT INTO `t_orderdtrail` VALUES ('4', '5', '1', '');
INSERT INTO `t_orderdtrail` VALUES ('5', '6', '2', '一公斤一袋分装');
INSERT INTO `t_orderdtrail` VALUES ('6', '2', '3', '');
INSERT INTO `t_orderdtrail` VALUES ('7', '4', '1', '');
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