教务管理数据库设计

学生

Student {
	s_id int primary key,
	s_name nvarchar(10) not null,
	s_sex nchar(1) not null check(s_sex=’男’ or s_sex=’女’),
	s_class int not null,
	s_address nvarchar(50),
	s_credit int default(0),
	s_time date default(getDate()),
}

教师

Teacher {
	t_id int primary key,
	t_name nchar(10) not null,
	t_sex nvarchar(1) not null check(s_sex=’男’ or s_sex=’女’),
}

院系

Department {
	d_id int primary key,
	d_name nvarchar(10) not null
}

专业

Specialty {
	s_id int primary key,
	s_name nvarchar(10) not null,
	s_department int not null
}

班级

Class {
	c_id int primary key,
	c_name nvarchar(10) not null,
	c_specialty int not null
}

课程

Course {
	c_id int primary key,
	c_name nvarchar(10) not null,
	c_category int not null,
	c_emphasis bit not null default(0),
	c_type nvarchar(10) not null,
	c_credit int not null,
	c_theoryTime int check(c_theoryTime>0),
	c_practiceTime int check(c_practiceTime >0),
	c_methods nchar(2) not null check(s_methods = ’考试’ or s_methods = ‘考查’),
	c_specialty int not null,
}

课程类别

CourseCategory {
	c_id int primary key,
	c_name nvarchar(10) not null,
	c_property nvarchar(10) not null,
	c_credit int not null check(c_credit > 0),
	c_time int check(c_time > 0),
	c_remarks nvarchar(50)
}

中间表对应“多对多的关系”

(学生，课程)

StudentDetails {
	s_studentId int,
	s_courseId int,
	s_teacherId int,
	s_score int not null default(0) check(s_score > 0),
	s_time varchar(10) not null,
	s_term int not null,
	primary key(s_studentId, s_courseId)
}

(院系，课程)

SpecialtyDetails {
	s_specialtyId int,
	s_courseId int,
	primary key(s_specialtyId,s_courseId)
}

E-R图设计

写于2013-04-16 10:35