MySQL implements the user rights management function of the ordering system

MySQL implements the user rights management function of the ordering system, specific code examples are required

Title: MySQL implements the user rights management function of the ordering system

Introduction:
User rights management is a very important function in a system. It can control users' access rights to different resources in the system and ensure the data security and stability of the system. This article will introduce how to use MySQL to implement the user rights management function of the ordering system and give specific code examples.

Text:

1. Create user table and permission table:
   First you need to create two tables in MySQL, one is the user table, which is used to store the user’s login account and Password and other information; the other is the permission table, used to store users' access permissions to different resources.

The structure of the user table is as follows:

CREATE TABLE user (
id INT(11) NOT NULL AUTO_INCREMENT,
username VARCHAR(50) NOT NULL,
password VARCHAR(50) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

The structure of the permission table is as follows:

CREATE TABLE permission (
id INT(11 ) NOT NULL AUTO_INCREMENT,
user_id INT(11) NOT NULL,
resource VARCHAR(50) NOT NULL,
PRIMARY KEY (id),
FOREIGN KEY (user_id) REFERENCES user(id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2. Insert test data:
   Next, insert some test data for subsequent permission management function testing.

The SQL statement to insert user data is as follows:

INSERT INTO user (username, password)
VALUES ('user1', '123456'),

   ('user2', '123456'),
   ('user3', '123456');

The SQL statement to insert permission data is as follows:

INSERT INTO permission (user_id, resource)
VALUES (1, 'order'),

   (1, 'menu'),
   (2, 'menu'),
   (3, 'order');

3. Implement the user login function:
   In the ordering system, you first need to implement the user Login function. When a user logs in, it is necessary to verify whether the account number and password entered by the user are correct.

The following is an example of a simple SQL query statement for user login:

SELECT *
FROM user
WHERE username = 'user1'
AND password = '123456';

If the query result is empty, it means the account or password is wrong; if the query result is not empty, it means the account number If the password verification is passed, you can continue with subsequent operations.

4. Implement the permission verification function:
   After the user login verification is passed, access control can be performed on different resources in the system according to the user's permissions.

The following is an example of a simple permission verification SQL query statement:

SELECT *
FROM permission
WHERE user_id = 1
AND resource = 'order';

If the query result is empty, it means that the user does not have the right to access the specified resource; if the query result is not empty, it means This user has access to the specified resource.

You can use more complex query statements to implement richer permission verification functions based on actual needs, such as using connection queries to obtain the user's specific permission list.

Summary:
Through the above steps, we can use MySQL to implement the user rights management function of the ordering system. When a user logs in, he or she can verify the correctness of the account and password, and after successful verification, access to different resources in the system can be controlled based on the user's permissions.

Of course, the above code example is just a simple demonstration, and the actual permission management function may be more complex. In actual development, more details and security issues need to be considered, such as password encrypted storage, preventing SQL injection, etc.

I hope the introduction in this article can help you understand and implement the user rights management function.

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