//1. Use the npm command to install the mysql module
npm install mysql
//2.Introduce the mysql module into the .js file
const mysqlModule = require('mysql');
//3. Create a mysql link object
const mysqlConnection = mysqlModule.createConnection({
Host: The database address to connect to. (Default: localhost)
Port: The port corresponding to the connection address. (Default: 3306)
LocalAddress: The source IP address uses TCP. Connection. (Optional)
socketPath: When the host and port parameters are ignored, you can fill in a Unix Socket address
user: mysql connection user name. ## Password: The password of the corresponding user.
Database: The name of the database to be connected. (Optional)
Charset: This is the encoding format in mysql. For example: utf8_general_ci) If specified, it is used as the default sorting rule (Default: utf8_general_ci)
Timezone: Used to save the current local time zone (Default: local)
ConnectTimeout: Set the time after which a failure will be returned if no response occurs during the connection. (Default: 10000)
StringifyObjects: stringify object instead of the conversion value issue# 501 (Default: false)
insecureAuth. : Use the old (unsafe) connection method to connect to MySQL. (Default: false)
typeCast: Determine whether the column value needs to be converted to a native JavaScript type. (Default: true)
queryFormat. : Custom query method. Address: Custom format .
SupportBigNumbers: If you use BIGINT and DECIMAL format table columns, you need to enable this parameter to support (default: false) only if they exceed JavaScript. When the longest byte that can be expressed, if this parameter is not set, the too long number will be passed as a string. Otherwise, the length of the object is returned. If the supportBigNumbers parameter is omitted, this parameter will also be ignored.
DateStrings: Some date types (TIMESTAMP, DATETIME, DATE) will be returned as Strings and then converted into JavaScript date objects. (Default: false)
Debug: Whether to print the connection status to a file. (Default: false)
Trace: Generate a stack trace of the error, including the call location of the library entry ("long stack trace"). There is generally a slight performance penalty. (Default: true)
});
//4. Open the mysql linkmysqlConnection.connect();
The above is the detailed content of NodeJS link to MySql database method. For more information, please follow other related articles on the PHP Chinese website!

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.


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

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Atom editor mac version download
The most popular open source editor

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Dreamweaver CS6
Visual web development tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
