mysql实战

一、项目要求

二、项目内容

2.1 数据库的登录

[root@yuanandzhen ~]# mysql -u root -p
Enter password: 
 

2.2 数据库的创建

mysql> create database mydb6_product;
Query OK, 1 row affected (0.00 sec)

 

2.3 使用本数据库

mysql> use mydb6_product;
Database changed
 

2.4 建表

2.4.1 employees表

mysql> create table employees(id int primary key, name varchar(50) not null, age int, gender varchar(10) not null default 'unknown',  salary float);
Query OK, 0 rows affected (0.02 sec)
 

2.4.2 orders表

mysql> create table orders(
    -> id int primary key,
    -> name varchar(100) not null,
    -> price float,
    -> quantity int,
    -> category varchar(50)
    -> );
Query OK, 0 rows affected (0.02 sec)
 

2.4.3 invoices表

mysql> create table invoices( number int primary key auto_increment, order_id int, in_date date, total_amount float check(total_amount > 0), foreign key (order_id) references orders(id) );
Query OK, 0 rows affected (0.02 sec)