MySQL 考试练习题

业界资讯 2023-06-25 06:40:48 阅读次数: 0

1、用户表account

1、用户表account(用户编号userid，用户名fullname，密码passward，性别sex，住址adderss，邮箱email，电话phone)

  • account(userid char(6),fullname char(4),passward char(7),sex char(2),adderess char(6),email char(20),phone char(12))

  • account(userid,fullname,passward,sex,adderess,email,phone)

('u0001','刘晓和','123456','男','广东深圳市','[email protected]','13512345678'),
('u0002','张嘉庆','123456','男','广东深圳市','[email protected]','13512345679'),
('u0003','罗红红','123456','女','广东深圳市','[email protected]','13512345689'),
('u0004','李昊华','123456','女','广东深圳市','[email protected]','13812345679'),
('u0005','王天赐','123456','男','广东中山市','[email protected]','13802345679'),
('u0006','吴美霞','123456','女','广东珠海市','[email protected]','13512345879');

代码过程

#显示所有数据库
mysql> show databases; 
+--------------------+
| Database           |
+--------------------+
| information_schema |
| club               |
| exam               |
| mysql              |
| performance_schema |
| qq                 |
| sys                |
+--------------------+
7 rows in set (0.02 sec)
#创建exam数据库
mysql> create database exam; 
Query OK, 1 row affected (0.01 sec)

#定义字符类型为utf8
mysql>  alter database exam charset utf8; 
Query OK, 1 row affected (0.00 sec)

#进入exam数据库
mysql> use exam;
Database changed

#创建数据库的字段
mysql> create table account(userid char(6),fullname char(4),passward char(7),sex char(2),adderess char(6),email char(20),phone char(12));
Query OK, 0 rows affected (0.03 sec)

#进入数据库exam
mysql> use exam;
Database changed

#选择account数据表
mysql> select * from account;
Empty set (0.00 sec)

#插入新的内容
mysql> insert into account(userid,fullname,passward,sex,adderess,email,phone) values('u0001','刘晓和','123456','男','广 东深圳市','[email protected]','13512345678');
Query OK, 1 row affected (0.01 sec)

#批量插入新的内容
mysql> insert into account(userid,fullname,passward,sex,adderess,email,phone) values
    -> ('u0002','张嘉庆','123456','男','广东深圳市','[email protected]','13512345679'),
    -> ('u0003','罗红红','123456','女','广东深圳市','[email protected]','13512345689'),
    -> ('u0004','李昊华','123456','女','广东深圳市','[email protected]','13812345679'),
    -> ('u0005','王天赐','123456','男','广东中山市','[email protected]','13802345679'),
    -> ('u0006','吴美霞','123456','女','广东珠海市','[email protected]','13512345879');
Query OK, 5 rows affected (0.00 sec)
Records: 5  Duplicates: 0  Warnings: 0

#显示所有内容
mysql> select * from account;
+--------+-----------+----------+------+-----------------+-----------------+-------------+
| userid | fullname  | passward | sex  | adderess        | email           | phone       |
+--------+-----------+----------+------+-----------------+-----------------+-------------+
| u0001  | 刘晓和    | 123456   | 男   | 广东深圳市      | [email protected]   | 13512345678 |
| u0002  | 张嘉庆    | 123456   | 男   | 广东深圳市      | [email protected] | 13512345679 |
| u0003  | 罗红红    | 123456   | 女   | 广东深圳市      | [email protected]   | 13512345689 |
| u0004  | 李昊华    | 123456   | 女   | 广东深圳市      | [email protected]    | 13812345679 |
| u0005  | 王天赐    | 123456   | 男   | 广东中山市      | [email protected]  | 13802345679 |
| u0006  | 吴美霞    | 123456   | 女   | 广东珠海市      | [email protected]    | 13512345879 |
+--------+-----------+----------+------+-----------------+-----------------+-------------+
6 rows in set (0.00 sec)

2、商品表product

  • (商品编号productid，商品分类号catid，商品名name，商品介绍descn，市场价格listprice，成本价格unitcost，数量qty)

  • (productid,catid,name,descn,listprice,unitcost,qty)

  • product(productid char(15),catid char(3),name char(10),descn char(15),listprice float(7,2),unitcost float(7,2),qty float(7,2))

('av-cb-01','05','亚马逊鹦鹉','75岁以上高龄的好伙伴',50.00,60.00,100),
('av-sb-02','05','燕雀','非常好的减压宠物',45.00,50.00,98),
('fi-fw-01','01','锦鲤','来自日本的淡水鱼',45.50,45.50,300),
('fi-fw-02','01','金鱼','来自中国的淡水鱼',6.80,6.80,100),
('fi-sw-01','01','天使鱼','来自澳大利亚的海水鱼',10.00,10.00,100),
('fi-sw-02','01','虎鲨','来自澳大利亚的海水鱼',18.50,20.00,200),
('fl-dlh-02','04','波斯猫','友好的家钜猫',1000.00,1200.00,15),
('fl-dsh-01','04','马恩岛猫','灭鼠能手',80.00,100.00,40),
('k9-bd-01','02','牛头犬','来自英格兰的友好的狗',1350.00,1500.00,5),
('k9-cw-01','02','吉娃娃犬','很好的陪伴狗',180.00,200.00,120),
('k9-dl-01','02','斑点狗','来自消防队的大狗',3000.00,3000.00,1),
('k9-po-02','02','狮子犬','来自法国可爱的狗',300.00,300.00,200),
('rp-li-02','03','鼠蹊','友好的绿色朋友',60.00,78.00,40),
('rp-sn-01','03','响尾蛇','兼当看门狗',200.00,240.00,10);

代码过程

mysql> create table product(productid char(15),catid char(3),name char(10),descn char(15),listprice float(7,2),unitcost float(7,2),qty float(7,2))
    -> ;
Query OK, 0 rows affected (0.01 sec)

mysql> select * from product;
Empty set (0.00 sec)

mysql> insert into product(productid,catid,name,descn,listprice,unitcost,qty) values
    -> ('av-cb-01','05','亚马逊鹦鹉','75岁以上高龄的好伙伴',50.00,60.00,100),
    -> ('av-sb-02','05','燕雀','非常好的减压宠物',45.00,50.00,98),
    -> ('fi-fw-01','01','锦鲤','来自日本的淡水鱼',45.50,45.50,300),
    -> ('fi-fw-02','01','金鱼','来自中国的淡水鱼',6.80,6.80,100),
    -> ('fi-sw-01','01','天使鱼','来自澳大利亚的海水鱼',10.00,10.00,100),
    -> ('fi-sw-02','01','虎鲨','来自澳大利亚的海水鱼',18.50,20.00,200),
    -> ('fl-dlh-02','04','波斯猫','友好的家钜猫',1000.00,1200.00,15),
    -> ('fl-dsh-01','04','马恩岛猫','灭鼠能手',80.00,100.00,40),
    -> ('k9-bd-01','02','牛头犬','来自英格兰的友好的狗',1350.00,1500.00,5),
    -> ('k9-cw-01','02','吉娃娃犬','很好的陪伴狗',180.00,200.00,120),
    -> ('k9-dl-01','02','斑点狗','来自消防队的大狗',3000.00,3000.00,1),
    -> ('k9-po-02','02','狮子犬','来自法国可爱的狗',300.00,300.00,200),
    -> ('rp-li-02','03','鼠蹊','友好的绿色朋友',60.00,78.00,40),
    -> ('rp-sn-01','03','响尾蛇','兼当看门狗',200.00,240.00,10);
Query OK, 14 rows affected (0.00 sec)
Records: 14  Duplicates: 0  Warnings: 0

mysql> select * fromm product;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'fromm product' at line 1
mysql> select * from product;
+-----------+-------+-----------------+--------------------------------+-----------+----------+--------+
| productid | catid | name            | descn                          | listprice | unitcost | qty    |
+-----------+-------+-----------------+--------------------------------+-----------+----------+--------+
| av-cb-01  | 05    | 亚马逊鹦鹉      | 75岁以上高龄的好伙伴           |     50.00 |    60.00 | 100.00 |
| av-sb-02  | 05    | 燕雀            | 非常好的减压宠物               |     45.00 |    50.00 |  98.00 |
| fi-fw-01  | 01    | 锦鲤            | 来自日本的淡水鱼               |     45.50 |    45.50 | 300.00 |
| fi-fw-02  | 01    | 金鱼            | 来自中国的淡水鱼               |      6.80 |     6.80 | 100.00 |
| fi-sw-01  | 01    | 天使鱼          | 来自澳大利亚的海水鱼           |     10.00 |    10.00 | 100.00 |
| fi-sw-02  | 01    | 虎鲨            | 来自澳大利亚的海水鱼           |     18.50 |    20.00 | 200.00 |
| fl-dlh-02 | 04    | 波斯猫          | 友好的家钜猫                   |   1000.00 |  1200.00 |  15.00 |
| fl-dsh-01 | 04    | 马恩岛猫        | 灭鼠能手                       |     80.00 |   100.00 |  40.00 |
| k9-bd-01  | 02    | 牛头犬          | 来自英格兰的友好的狗           |   1350.00 |  1500.00 |   5.00 |
| k9-cw-01  | 02    | 吉娃娃犬        | 很好的陪伴狗                   |    180.00 |   200.00 | 120.00 |
| k9-dl-01  | 02    | 斑点狗          | 来自消防队的大狗               |   3000.00 |  3000.00 |   1.00 |
| k9-po-02  | 02    | 狮子犬          | 来自法国可爱的狗               |    300.00 |   300.00 | 200.00 |
| rp-li-02  | 03    | 鼠蹊            | 友好的绿色朋友                 |     60.00 |    78.00 |  40.00 |
| rp-sn-01  | 03    | 响尾蛇          | 兼当看门狗                     |    200.00 |   240.00 |  10.00 |
+-----------+-------+-----------------+--------------------------------+-----------+----------+--------+
14 rows in set (0.00 sec)

3、购物车表shopcat

  • (购物车编号shopcatid，用户编号userid，商品编号productid，数量quantity，单价unitprice，总价totalprice，订单日期orderdate，订单状态status)

  • (shopcatid,userid,productid,quantity,unitprice,totalprice,orderdate,status)

  • (shopcatid int,userid char(6),productid char(9),quantity int,unitprice float(6,2),totalprice int,orderdate char(11),status int)

(20130411,'u0001', 'fi-sw-01',10,18.50,0,'2013-04-11 15:07:34', 0),
(20130412,'u0002', 'k9-bd-01',2,120.00,0,'2013-04-09 15:08:11', 0),
(20130413,'u0003', 'k9-dl-01',2,130.00,0,'2013-04-15 15:09:34', 0),
(20130414,'u0003', 'rp-sn-01',3,125.00,0,'2013-04-15 15:09:30', 1),
(20130415,'u0004', 'av-sb-02',2,50.00,0,'2013-04-02 15:10:34', 0);

代码过程

mysql> create table shopcat;
ERROR 1113 (42000): A table must have at least 1 column
mysql> create table shopcat(shopcatid int,userid char(6),productid char(9),quantity int,unitprice float(6,2),totalprice int,orderdate char(11),status int);
Query OK, 0 rows affected (0.02 sec)

mysql> select * from shopcat;
Empty set (0.00 sec)

mysql> insert into shopcat(shopcatid,userid,productid,quantity,unitprice,totalprice,orderdate,status) values
    -> (20130411,'u0001', 'fi-sw-01',10,18.50,0,'2013-04-11 15:07:34', 0),
    -> (20130412,'u0002', 'k9-bd-01',2,120.00,0,'2013-04-09 15:08:11', 0),
    -> (20130413,'u0003', 'k9-dl-01',2,130.00,0,'2013-04-15 15:09:34', 0),
    -> (20130414,'u0003', 'rp-sn-01',3,125.00,0,'2013-04-15 15:09:30', 1),
    -> (20130415,'u0004', 'av-sb-02',2,50.00,0,'2013-04-02 15:10:34', 0);
ERROR 1406 (22001): Data too long for column 'orderdate' at row 1
mysql> create table shopcat(shopcatid int,userid char(6),productid char(9),quantity int,unitprice float(6,2),totalprice int,orderdate char(25),status int);
ERROR 1050 (42S01): Table 'shopcat' already exists

# 修改字段长度命令
mysql> alter table shopcat modify column orderdate varchar(25);
Query OK, 0 rows affected (0.03 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> insert into shopcat(shopcatid,userid,productid,quantity,unitprice,totalprice,orderdate,status) values
    -> (20130411,'u0001', 'fi-sw-01',10,18.50,0,'2013-04-11 15:07:34', 0),
    -> (20130412,'u0002', 'k9-bd-01',2,120.00,0,'2013-04-09 15:08:11', 0),
    -> (20130413,'u0003', 'k9-dl-01',2,130.00,0,'2013-04-15 15:09:34', 0),
    -> (20130414,'u0003', 'rp-sn-01',3,125.00,0,'2013-04-15 15:09:30', 1),
    -> (20130415,'u0004', 'av-sb-02',2,50.00,0,'2013-04-02 15:10:34', 0);
Query OK, 5 rows affected (0.01 sec)
Records: 5  Duplicates: 0  Warnings: 0

mysql> select * from shopcat;
+-----------+--------+-----------+----------+-----------+------------+---------------------+--------+
| shopcatid | userid | productid | quantity | unitprice | totalprice | orderdate           | status |
+-----------+--------+-----------+----------+-----------+------------+---------------------+--------+
|  20130411 | u0001  | fi-sw-01  |       10 |     18.50 |          0 | 2013-04-11 15:07:34 |      0 |
|  20130412 | u0002  | k9-bd-01  |        2 |    120.00 |          0 | 2013-04-09 15:08:11 |      0 |
|  20130413 | u0003  | k9-dl-01  |        2 |    130.00 |          0 | 2013-04-15 15:09:34 |      0 |
|  20130414 | u0003  | rp-sn-01  |        3 |    125.00 |          0 | 2013-04-15 15:09:30 |      1 |
|  20130415 | u0004  | av-sb-02  |        2 |     50.00 |          0 | 2013-04-02 15:10:34 |      0 |
+-----------+--------+-----------+----------+-----------+------------+---------------------+--------+
5 rows in set (0.00 sec)
代码说明：修改字段长度命令
  • 语法alter table 表名 modify column 列名 类型(要修改的长度);
  • 修改mrflysand表中id的char值为10个字长alter table mrflysand modify column id varchar(10);

猜你喜欢

转载自blog.csdn.net/MrFlySand/article/details/129543997
今日推荐
Arc Browser for Windows 1.0 正式 GA
90后程序员开发视频搬运软件、不到一年获利超 700 万，结局很刑！
《美国对全球网络空间安全与发展的威胁和破坏》报告发布
火速冲上 GitHub 热榜 —— 开源编程语言、框架哪有这么可爱？
北京人形机器人创新中心发布全球首个纯电驱拟人奔跑的全尺寸人形机器人“天工”
周排行
rbac——界面、权限
Apache CXF + SpringMVC 整合发布WebService
so插件化
Vue.js实战系列---图标字体制作（svg格式）
PAT乙级 1007 素数对猜想(孪生素数对) (20分) ---（C语言 + 详细注释）
被IRM保护的文档，打开失败
Calendar和Date计算日期差的小问题
win10子系统ubuntu18.4安装docker
利用Wrap Shell Script定位Android Native内存泄漏
MySQL: Transaction (Part I - Basic Concept)
每日归档
更多
2024-05-03(19)
2024-05-02(0)
2024-05-01(4)
2024-04-30(1)
2024-04-29(40)
2024-04-28(0)
2024-04-27(56)
2024-04-26(39)
2024-04-25(22)
2024-04-24(36)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022