User rights management solution in the MySQL table structure design of the online examination system

The user rights management solution in the MySQL table structure design of the online examination system requires specific code examples

With the development of the Internet, more and more educational institutions and companies began to adopt online examination systems to conduct examinations and assess student learning outcomes. The online examination system not only provides a convenient examination method, but also can automatically handle tedious tasks such as answer sheets and grading. In such an online examination system, user rights management is a very important issue. Reasonable user rights management can ensure the security and reliability of the system.

In the MySQL database, we can implement user rights management by designing an appropriate table structure and writing corresponding code. Below, we will introduce a user rights management solution based on table structure design and code examples.

1. User table (user)
   The user table is used to store all user information in the system, including user name, password, role and other fields.

CREATE TABLE user (
id int(11) NOT NULL AUTO_INCREMENT,
username varchar(50 ) NOT NULL,
password varchar(255) NOT NULL,
role_id int(11) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2. Role table (role)
   The role table is used to store information about all roles in the system, including role names and other fields.

CREATE TABLE role (
id int(11) NOT NULL AUTO_INCREMENT,
rolename varchar(50 ) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

3. Permission table (permission)
   Permission table is used Information about all permissions in the storage system, including permission names, roles, and other fields.

CREATE TABLE permission (
id int(11) NOT NULL AUTO_INCREMENT,
permname varchar(50 ) NOT NULL,
role_id int(11) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

4. User role table (user_role)
   The user role table is used to store the relationship between users and roles.

CREATE TABLE user_role (
id int(11) NOT NULL AUTO_INCREMENT,
user_id int(11 ) NOT NULL,
role_id int(11) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

5. Role permission table (role_permission)
   The role permission table is used to store the relationship between roles and permissions.

CREATE TABLE role_permission (
id int(11) NOT NULL AUTO_INCREMENT,
role_id int(11 ) NOT NULL,
perm_id int(11) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

The above is the MySQL table structure design of the online examination system. Below we will introduce specific code examples to implement user rights management.

1. Add user

INSERT INTO user (username, password, role_id ) VALUES ('admin', '123456', 1);

2. Add role

INSERT INTO role ( rolename) VALUES ('Administrator');

3. Add Permission

INSERT INTO permission (permname , role_id) VALUES ('Add user', 1);

4. Add user role relationship

INSERT INTO user_role (user_id, role_id) VALUES (1, 1);

5. Add role permission relationship

INSERT INTO role_permission (role_id, perm_id) VALUES (1, 1);

Through the above code examples, we can add users and add roles Add, add permissions and establish user role relationships and role permission relationships. In this way, we can flexibly control user permissions and ensure the security and reliability of the system.

When a user logs in to the system, the user's permissions can be determined based on the user's role, thereby limiting the user's operations on the system. For example, only users with the administrator role can add users and set permissions.

To sum up, when designing the MySQL table structure of the online examination system, a reasonable user rights management solution is very important. Through reasonable table structure design and corresponding code implementation, we can flexibly control user permissions and ensure the security and reliability of the system. I hope the above content will help you understand the user rights management of the online examination system.

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