Interaction sample code between NodeJS and Mysql_javascript skills
Install Mysql Module into NodeJS
Js code
$npm install Mysql
JS script mysqlTest.js
Js code
// mysqlTest.js
//Load mysql Module
var Client = require('mysql').Client,
client = new Client( ),
//The name of the database to be created
TEST_DATABASE = 'nodejs_mysql_test',
//The name of the table to be created
TEST_TABLE = 'test';
/ /Username
client.user = 'root';
//Password
client.password = 'root';
//Create connection
client.connect();
client.query('CREATE DATABASE ' TEST_DATABASE, function(err) {
if (err && err.number != Client.ERROR_DB_CREATE_EXISTS) {
throw err;
}
}) ;
// If no callback is provided, any errors will be emitted as `'error'`
// events by the client
client.query('USE ' TEST_DATABASE);
client.query(
'CREATE TABLE ' TEST_TABLE
'(id INT(11) AUTO_INCREMENT, '
'title VARCHAR(255), '
'text TEXT, '
'created DATETIME, '
'PRIMARY KEY (id))'
);
client.query(
'INSERT INTO ' TEST_TABLE ' '
'SET title = ?, text = ?, created = ?',
['super cool', 'this is a nice text', '2010-08-16 10:00:23']
);
var query = client.query(
'INSERT INTO ' TEST_TABLE ' '
'SET title = ?, text = ?, created = ?',
['another entry', 'because 2 entries make a better test ', '2010-08-16 12:42:15']
);
client.query(
'SELECT * FROM ' TEST_TABLE,
function selectCb(err, results, fields) {
if (err) {
throw err;
}
console.log(results);
console.log(fields);
client.end ();
}
);
Execute script
Js code
root@sammor-desktop:/var/iapps/nodejs/work# node mysqlTest.js


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











Node.js is a server-side JavaScript runtime, while Vue.js is a client-side JavaScript framework for creating interactive user interfaces. Node.js is used for server-side development, such as back-end service API development and data processing, while Vue.js is used for client-side development, such as single-page applications and responsive user interfaces.

Node.js can be used as a backend framework as it offers features such as high performance, scalability, cross-platform support, rich ecosystem, and ease of development.

The following global variables exist in Node.js: Global object: global Core module: process, console, require Runtime environment variables: __dirname, __filename, __line, __column Constants: undefined, null, NaN, Infinity, -Infinity

To connect to a MySQL database, you need to follow these steps: Install the mysql2 driver. Use mysql2.createConnection() to create a connection object that contains the host address, port, username, password, and database name. Use connection.query() to perform queries. Finally use connection.end() to end the connection.

There are two npm-related files in the Node.js installation directory: npm and npm.cmd. The differences are as follows: different extensions: npm is an executable file, and npm.cmd is a command window shortcut. Windows users: npm.cmd can be used from the command prompt, npm can only be run from the command line. Compatibility: npm.cmd is specific to Windows systems, npm is available cross-platform. Usage recommendations: Windows users use npm.cmd, other operating systems use npm.

Yes, Node.js is a backend development language. It is used for back-end development, including handling server-side business logic, managing database connections, and providing APIs.

Yes, Node.js can be used for front-end development, and key advantages include high performance, rich ecosystem, and cross-platform compatibility. Considerations to consider are learning curve, tool support, and small community size.

The main differences between Node.js and Java are design and features: Event-driven vs. thread-driven: Node.js is event-driven and Java is thread-driven. Single-threaded vs. multi-threaded: Node.js uses a single-threaded event loop, and Java uses a multi-threaded architecture. Runtime environment: Node.js runs on the V8 JavaScript engine, while Java runs on the JVM. Syntax: Node.js uses JavaScript syntax, while Java uses Java syntax. Purpose: Node.js is suitable for I/O-intensive tasks, while Java is suitable for large enterprise applications.
