[Database Course Design] classroom information management system based on SQL Server (with part of source code)

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[ Database course design ] Classroom information management system （ Attached part of the source code ）

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Preface

In College , The classroom is still the main place for teaching , It is also an important place for students to study , Therefore, classroom environment and equipment directly affect the development of teaching activities and students' learning . In order to ensure the good operation of the classroom environment , Classroom management is also very necessary and important . But the management of the classroom is not an easy thing . The use of classrooms is planned and mobile , That is, one class in the corresponding time , The courses and classrooms are fixed , But different classes use different classrooms at different times , This is closely related to the curriculum arrangement of the academic affairs office . So , After more detailed investigation and careful consideration , I decided to build a classroom management system , To solve these problems , Simplify management , Convenient and more effective .
key word ： database classroom management

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1. summary

In College , The classroom is still the main place for teaching , It is also an important place for students to study , Therefore, classroom environment and equipment directly affect the development of teaching activities and students' learning .
In order to ensure the good operation of the classroom environment , Classroom management is also very necessary and important . But the management of the classroom is not an easy thing . Any damage to classroom equipment must be registered in time , Repair , Otherwise, it may affect the future teaching , Cause teaching accidents .
The use of classrooms is planned and mobile , That is, one class in the corresponding time , The courses and classrooms are fixed , But different classes use different classrooms at different times , This is closely related to the curriculum arrangement of the academic affairs office .
So , After more detailed investigation and careful consideration , I decided to build a classroom information management system , To solve these problems , Simplify management , Convenient and more effective .
Organization of curriculum design report ：
This course design report mainly includes three aspects :(1) The front part : cover 、 Catalog page ;(2) Main part : Abstract ( The purpose of curriculum design 、 Tasks and requirements, etc )、 Text 、 Conclusion 、 reference ;(3) Postscriptural Matter : Design drawings 、 Photos, etc. .

2. Demand analysis

2.1 Classroom usage in the school

The components of the school related to classroom management are ： Student 、 Teachers and classrooms . All the daily work of the school is carried out around these three parts .
The school has several colleges , Such as software college 、 School of mathematics and statistics 、 College of foreign languages, etc ; Each college has many specialties , For example, the software college has three majors ： Computer science and technology 、 Software Engineering 、 Data science and technology ; Each major is equipped with several teachers , The title of each teacher may vary . meanwhile , Teachers can offer several courses , A course can be taught by more than one teacher . Each major offers several courses , For example, the software engineering major of the software college has database principles 、 Operating system principles and other courses . Each major consists of several classes , The major of the class 、 The number of 、 Student information varies .
Each classroom can take different courses at different times .

2.2 User requirements

(1) Basic information requirements ：
Basic information of Teachers ( Teacher's teacher number , Teacher's name , Gender , Department , The title , Job number );
Basic information of students ( Student's student number , full name , Department number , ID number );
Basic information about the classroom ( The classroom number of the classroom , The type of classroom , Classroom capacity , Multimedia situation in the classroom );
Basic information of the course ( Course number , Course name 、 course credit 、 Types of courses 、 Department No );
Basic information of the Department ( Department number 、 The name of the Department );
(2) Processing information requests ：
In order to properly manage classroom information , The utilization efficiency of the classroom is improved , Improve the current school classroom management system , Fully satisfy teachers 、 Students' requirements , Must have rules for classroom borrowing 、 The use conditions shall be clearly specified and clearly displayed .
(3) Safety requirements ：
a、 The identity of the access user is unique to identify whether it is a legitimate user , And require legal users to set their passwords , Ensure that the user's identity is not stolen ;
b、 Different data sets different access levels , Restrict access to the categories and contents of data that users can query and process ;
c、 Different users set different permissions , Distinguish between different users , As a student 、 Teachers and administrators of the academic affairs office . Student （ Only the classroom can be queried 、 Teacher and course information and application for classroom borrowing ）, Teachers' （ Only the classroom can be queried 、 Teacher and course information , And apply for classroom borrowing ）, Management （ Can handle daily affairs , If increase 、 Delete 、 Update the course 、 classroom 、 Teacher information , And approve or reject the application for borrowing the classroom ）.
(4) Integrity requirements
a、 Completeness of various information records , Determine whether the information record content can be empty according to the actual situation ;
b、 The correctness of the relationship between various data ( Foreign keys 、 Correct setting of primary key, etc );
c、 Consistency of the same data in different records （ In the process of data connection, the connection elements between tables should be used reasonably ）.

2.3 functional requirement

Realize teacher information numbering , full name , Gender , Department , Management of professional title, etc
Realize student information , Student number , full name , Department number , Management of ID number, etc
Realize classroom information numbering , The type of classroom , Classroom capacity , Management of classroom multimedia situation
Create a rule to restrict gender items. You can only enter “ male ” or “ Woman ”
Create views to query different types of classrooms of different sizes and their usage
Create a stored procedure to generate the curriculum of the specified teacher
When you create a trigger to delete teacher information, delete the corresponding teacher class information
Establish referential integrity constraints between database related tables

3． Conceptual structural design

3.1 Abstract the entities of the system

Teacher information entity - Attribute map

Student information entity - Attribute map

Classroom information entity - Attribute map

Course information entity - Attribute map

Department information entity - Attribute map

3.2 Design points E-R chart

chart 3.2.1 Student - Course branch E-R chart

chart 3.2.2 Student - departments - Teachers' branch E-R chart

chart 3.2.3 Teachers' - Course - classroom branch E-R chart

3.3 overall situation E-R chart

chart 3.3.1 Classroom information management system E-R chart

4． Logical structure design

classroom （ Classroom number , The type of classroom , Classroom capacity , Classroom multimedia ）
departments （ Department number , The name of the Department ）
Course （ Course no. , Course name , course credit , Course type , School / department number of the course ）
Teachers' （ Teacher number , Teacher's name , Gender , Department , The title , ID number ）
Student （ Student number , full name , Department number , ID number ）
Teacher schedule （ Classroom number , Class time , Class hours , Teacher number , Course no. , Department number ）
Classroom borrowing form （ Classroom number , Student number , Date of use , Borrowing time period , Working day , purpose , Approval status ）

4.1 The data dictionary

5． Database physical design and implementation

Establish database and basic tables

Classroom information sheet

Course information sheet

Department information sheet

Student information sheet

Teacher information sheet

Classroom borrowing form

Teacher's class information

Database diagram

6． Data operation requirements and implementation

6.1 Data query 、 update operation

Realize teacher information numbering , full name , Gender , Department , Management of professional title, etc
select * from Teacher information

Realize student information , Student number , full name , Department number , Management of ID number, etc
select * from Student information

Realize classroom information numbering , The type of classroom , Classroom capacity , Management of classroom multimedia situation
select * from Classroom information

6.2 View

Create views to query different types of classrooms of different sizes and their usage
– Create a classroom information query view that requires a multimedia ordinary classroom

select * from  Multimedia ordinary classroom information query 

– Create a classroom information query view that requires a multi-media ladder classroom

select * from  Multimedia ladder classroom information query 

– Create a classroom information query view that does not require a multimedia classroom

select * from  No multimedia ordinary classroom information query 

– Create a ladder classroom information query view without multimedia

select * from  Large classroom information query 

– View query of student application information

select * from  Application information 

6.3 trigger

When you create a trigger to delete teacher information, delete the corresponding teacher class information

delete from  Teacher information  where  Teacher number ='10101080'select * from  Teacher information select * from  Teacher's class information 

6.4 stored procedure

Create a stored procedure to generate the curriculum of the specified teacher

execute  Teacher schedule  '10101080'

7． summary

Through this database course design , I learned more about database , I feel that it is not easy to make a good system , It must be investigated in detail , Understand all the processes and data involved , Take into account all possible situations and treatment methods . When establishing the corresponding database , Not only comprehensive but also complete , This process is very difficult . More Than This , There are also issues such as security and integrity , Optimization and efficiency of stored procedures , It also needs to be considered in all aspects .
At the same time, I realize , Before designing the database , It is also necessary to make adequate preparations 、 Very important , It combines Sql Server 2008 The database of 、 surface 、 View 、 trigger 、 Application of the creation of stored procedures and functions , And simple operations such as data addition, deletion, query and modification , Let me really feel that if I want to master this , You have to work hard .

reference

[1] Chensufang . elementary analysis SQL Server Database performance optimization methods [J]. Information recording materials ,2021,22(05):90-91.DOI:10.16009/j.cnki.cn13-1295/tq.2021.05.049.
[2] Wang Xiaoyan .MySQL Basic principles of query [J]. Office automation ,2021,26(15):61-62+47.
[3] Wang Shan Sashixuan . Database system overview ( The fifth edition )[J]. Higher Education Press ,2014.9: 978-7-04-040664-1
[4] Zhao Jie , Yang Lili , Chen Yu . Database principle and application [M]. People's post and Telecommunications Press :, 201302.285.
[5] Chenxiantong . Database foundation and application —SQL Server 2005[M]. Chongqing University Press : Key construction projects of national backbone higher vocational colleges —— A series of teaching materials for software technology , 201501.213.
[6] Tang Yang . Research and implementation of database cursor and trigger mechanism [D]. National University of Defense Science and technology ,2004.

Attached part code

- Create a stored procedure to generate the curriculum of the specified teacher use  Classroom information management gocreate proc  Teacher schedule (@ Teacher number  int)asselect  Teacher information . Teacher's name   Teacher's name , Classroom information . Classroom number   Classroom number , Course information . Course name   Course name , Teacher's class information . week   week , Teacher's class information . Class hours   Section from  Teacher's class information     join  Classroom information  on  Teacher's class information . Classroom number = Classroom information . Classroom number     join  Teacher information  on  Teacher's class information . Teacher number = Teacher information . Teacher number     join  Course information  on  Teacher's class information . Course no. = Course information . Course no. where  Teacher's class information . Teacher number [email protected] Teacher number order by  Teacher's class information . week  desc, Teacher's class information . Class hours  ascGOexecute  Teacher schedule  '10101081'-- When you create a trigger to delete teacher information, delete the teacher's class information create trigger  Teacher delete trigger on  Teacher information instead of deleteasbegindelete  Teacher information  where  Teacher number =(select  Teacher number  from deleted)delete  Teacher's class information  where  Teacher number =(select  Teacher number  from deleted)endgo

author ： Ordinary netizens

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