Test question bank management system - database design [easy to understand]

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One 、 Outline design

1.1 Background and significance

at present , Most courses in many colleges and universities also adopt the unified model of examination and teaching to complete the teaching process , This traditional examination mode has great subjectivity and irregularity in the process from teaching to the implementation of examination . In addition, with the expansion of students in Colleges and universities in recent years , The teaching task is increasingly arduous , The workload of teachers is correspondingly increasing . There is an urgent need for computer-assisted instruction system to break this traditional teaching mode , Reduce the workload of Teachers , Improve the quality of teaching . therefore , This paper studies and designs an examination question bank management system , To solve and alleviate the existing problems in college curriculum teaching , Improve teaching quality and examination effect , Reduce teachers' work pressure . The test question bank management system can assist teachers in the question types of various test questions of the subjects taught 、 Difficulty and other relevant data are saved 、 Query and other information management ; And test students when necessary 、 When evaluating , Extract the required questions from the question bank , Form a set of test papers .

Firstly, this paper briefly introduces the feasibility analysis of developing the management system of test question bank , System requirements analysis and overall design , Then mainly for the design of the system 、 form 、 User interface design 、 The program design is analyzed in detail , And some key codes of the system are explained , At the same time, the basic idea and workflow of general system software design are given . Firstly, the system application prototype is established in a short time , then , Iterate the requirements of the initial prototype system , Constantly revise and improve , Until a feasible system satisfactory to users is formed .

1.2 Contents and requirements

Functional requirements

1. Teacher login information management （ Teacher number 、 Teacher's name 、 Major number ）

2. information management （ Test question type 、 Difficulty of test questions 、 Test subject number ）

3. Addition of test questions 、 Delete 、 Change 、 check 、 Classification and other functions

4. Professional information management of examination questions （ Major number 、 Professional name ）

5. Test paper information management （ Subject number 、 Question model 、 Time 、 Teacher number ）

6. View to see the number of questions in each major , The number of question types of each subject

7. data Referential integrity constraints between library related tables

Two 、 Demand analysis

2.1 Systematic investigation

A detailed investigation and Research on the current management business of the test question bank is an important basic work to understand the system requirements and carry out system analysis and design , Therefore, we should conduct a comprehensive and detailed investigation and Research on the management of our examination question bank . First of all, I communicated with relevant teachers , Understand their views on the management of the test question bank , See if there are any new requirements , On this basis , Combined with their own knowledge level , Develop the corresponding test question bank management system according to your ability .

In the investigation, we can find , The examination question bank of colleges and universities is extremely huge , If there is no intelligent system to liberate people from the manual stage , So a huge 、 A complete test question bank cannot run effectively , Even the teacher who gives the question cannot be effective 、 Accurately extract the test questions you need from the test question bank , This is equivalent to saying that it is a question bank without practical application value . So , They hope to have such a question bank that can express the attributes of the test questions in detail . So today we will focus on such a goal to carry out our work .

2.2 The user needs

To design a management system with good performance , It is primary and basic to clarify the requirements of the user's application environment for the system . The system analyzes user needs from the following four aspects :

1) . User's demand information : The teacher can see the type and content of the question, as well as the score and difficulty level of the test question . Of course, this authority is also given to administrators and department heads .

2) User's processing requirements : Teachers can insert and delete the question bank , Teachers can choose the test questions they need in the test question bank by virtue of their own customized topic selection requirements .

3) Adaptability to the system 、 General requirements : It is required that the system can not only provide the management of test question bank of a course , How many disciplines should be integrated for management , Establish an efficient management system of test question bank .

4) Security requirements for the system , Password verification is required to enter the system .

2.3 Development technology

development tool ：Microsoft SQL Server 2012

development language ：SQL

Development technology ： Database development technology

object-oriented ： The demanders

2.4 Main functions of the system

3、 ... and 、E-R chart

Of each entity E-R The figure is shown below ：

Four 、 Logical structure Design

4.1 Logical transformation

According to E-R Diagram can transform the conceptual model in the system into specific tables （ That is relationship ） structure , Will be divided into 8 A relationship , The details are as follows ：

major （ Major number 、 Professional name ）

Teachers' （ Teacher's job number 、 Teacher's name 、 Major number ）

subject （ Subject number 、 Subject name 、 Major number ）

Question type （ Question no 、 type 、 difficulty 、 Subject number 、 Teacher's job number ）

Design questions （ Question no 、 Question model 、 Content 、 answer ）

choice question （ Question no 、 Question model 、 Content 、 Options 1、 Options 2、 Options 3、 Options 4、 answer ）

Judgment questions （ Question no 、 Question model 、 Content 、 answer ）

The examination paper （ Test paper number 、 Subject number 、 Time 、 Teacher's job number 、 Content ）

4.2 Refine the table structure

For convenience , According to the above description , Use English abbreviations to name tables and columns , Determine the data type of the column and the necessary constraint rules , Give the basic structure and description of the database table as shown below ：

（1）. Professional information sheet

Name	explain	data type	constraint
Specialty_id	Major number	char(4)	not null primary key
Specialty_name	Professional name	varchar(10)	not null unique

(2) . Teacher information sheet

Name	explain	data type	constraint
Teacher_id	Teacher number	char(8)	not null primary key
Teacher_name	Teacher's name	varchar(10)	not null
Teacher_Specialty	Major number	char(4)	not null foreign key

（3）. Chart of account information

Name	explain	data type	constraint
Course_id	Account No	char(10)	not null primary key
Course_name	Subject name	varchar(10)	not null
Course_Specialty	Major number	char(4)	not null foreign key primary key

（4）. Question type information table

Name	explain	data type	constraint
Question_id	Question number	int	not null IDENTITY(1, 1) primary key
Question_name	Test question type	varchar(10)	not null
Question_level	Difficulty of test questions	varchar(4)	not null default ‘ Simple ‘
Question_Course	Account number	char(10)	not null
Question_Teacher	Teacher number	char(8)	not null

（5）. Design question information table

Name	explain	data type	constraint
Design_id	Question number	tinyint	not null IDENTITY(1, 1) primary key
Design_Question	Question model	int	not null foreign key
Design_Info	Content	text	not null
Design_answ	answer	text	not null

（6）. Multiple choice information table

Name	explain	data type	constraint
ChoiceQst_id	Question number	tinyint	not null IDENTITY(1, 1) primary key
ChoiceQst_Question	Question model	int	not null foreign key
ChoiceQst_Info	Content	text	not null
ChoiceQst_OP1	operation 1	text	not null
ChoiceQst_OP2	operation 2	text	not null
ChoiceQst_OP3	operation 3	text	not null
ChoiceQst_OP4	operation 4	text	not null
ChoiceQst_answ	answer	char	not null

（7）. True and false information table

Name	explain	data type	constraint
TrueOrFalse_id	Question number	tinyint	not null IDENTITY(1, 1) primary key
TrueOrFalse_Question	Question model	int	not null foreign key
TrueOrFalse_Info	Content	text	not null
TrueOrFalse_answ	answer	char	not null

（8）. Test paper information sheet

Name	explain	data type	constraint
Paper_id	Test paper number	tinyint	not null IDENTITY(1, 1) primary key
Paper_Course	Subject number	char(10)	not null
Paper_madedate	Time	datetime	not null
Paper_teacher	Teacher number	char(8)	not null foreign key
Paper_Info	Content	text	not null

5、 ... and . Database design

5.1 Create table

(1).Specialty Professional information sheet

(2). Teacher information sheet

(3). Chart of account information

(4). Question type information table

(5) . Design question information table

(6) . Multiple choice information table

(7) . True and false information table

(8) . Test paper information sheet

5.2 Create the necessary views

（1）. Create test questions – Account view

（2）. Design question view

（3）. Multiple choice view

(4). True or false view

6、 ... and 、 summary

After a week of design and development , The management system of test question bank is basically developed . Its function basically meets the needs of school administrators , Be able to complete the entry of test questions of various majors and disciplines , Automatic roll forming and other functions according to requirements .

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