Detailed introduction to the method of configuring MySQL in uni-app

With the development and popularization of mobile Internet, the development of mobile applications has attracted more and more attention. For developers, MySQL database is an excellent choice for data storage and management of mobile applications. How to configure the MySQL database in uni-app? This article will introduce in detail how to configure MySQL in uni-app.

1. Install MySQL

First you need to install the MySQL database on your local computer. You can download the MySQL installation package from the official website or install it through the terminal. After the installation is complete, open the MySQL database and create a new database.

2. Install the MySQL plug-in

To operate the MySQL database in uni-app, you need to install the MySQL plug-in, which can be installed through the npm command line. The specific steps are as follows:

1. Open the terminal and enter the uni-app project folder;
2. Execute the following command to install the MySQL plug-in:

npm install mysql --save

After the installation is completed, the plug-in will be automatically added to the "package.json" in the project " in the file.

3. Configure database connection

Open the uni-app project that needs to be connected to the MySQL database, find the "main.js" file, and according to the connection information of the MySQL database (server address, port number, User name, password, database name), add the following code:

var mysql = require('mysql');
var connection = mysql.createConnection({
  host: 'localhost',
  port: '3306',
  user: 'root',
  password: 'root',
  database: 'test'
});

connection.connect();

4. Execute SQL commands

After connecting to the MySQL database, you can execute SQL commands. In uni-app, using MySQL commands requires creating a SQL statement object, and then using the object to perform operations on the database. The specific process is as follows:

1. Use the "connection.query()" method to create a SQL statement Object;
2. Use the SQL statement object to execute related SQL commands;
3. Close the SQL statement object.

The sample code is as follows:

var sql = 'SELECT * FROM user';
connection.query(sql, function (err, results, fields) {
  if (err) throw err;
  console.log(results);
});

connection.end();

The above code executes a simple SQL query command. By executing this command, the result will return all the data in the "user" table.

5. Summary

Through the above steps, we can connect to the MySQL database in uni-app and use SQL commands to operate the database. Of course, there are more techniques and methods for using MySQL database, which require developers to continue to learn and practice to improve their database skills. This article is just a brief introduction to how to configure MySQL for uni-app. I hope it will be helpful to developers who need to develop uni-app database.

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