MySQL with Node.js - mysql

Question

I've just started getting into Node.js. I come from a PHP background, so I'm fairly used to using MySQL for all my database needs.
How can I use MySQL with Node.js?

Answer 1

Check out the node.js module list
node-mysql — A node.js module implementing the MySQL protocol
node-mysql2 — Yet another pure JS async driver. Pipelining, prepared statements.
node-mysql-libmysqlclient — MySQL asynchronous bindings based on libmysqlclient
node-mysql looks simple enough:
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'example.org',
user : 'bob',
password : 'secret',
});
connection.connect(function(err) {
// connected! (unless `err` is set)
});
Queries:
var post = {id: 1, title: 'Hello MySQL'};
var query = connection.query('INSERT INTO posts SET ?', post, function(err, result) {
// Neat!
});
console.log(query.sql); // INSERT INTO posts SET `id` = 1, `title` = 'Hello MySQL'

Answer 2

node-mysql is probably one of the best modules out there used for working with MySQL database which is actively maintained and well documented.

Answer 3

Since this is an old thread just adding an update:
To install the MySQL node.js driver:
If you run just npm install mysql, you need to be in the same directory that your run your server. I would advise to do it as in one of the following examples:
For global installation:
npm install -g mysql
For local installation:
1- Add it to your package.json in the dependencies:
"dependencies": {
"mysql": "~2.3.2",
...
2- run npm install
Note that for connections to happen you will also need to be running the mysql server (which is node independent)
To install MySQL server:
There are a bunch of tutorials out there that explain this, and it is a bit dependent on operative system. Just go to google and search for how to install mysql server [Ubuntu|MacOSX|Windows]. But in a sentence: you have to go to http://www.mysql.com/downloads/ and install it.

Answer 4

Here is production code which may help you.
Package.json
{
"name": "node-mysql",
"version": "0.0.1",
"dependencies": {
"express": "^4.10.6",
"mysql": "^2.5.4"
}
}
Here is Server file.
var express = require("express");
var mysql = require('mysql');
var app = express();
var pool = mysql.createPool({
connectionLimit : 100, //important
host : 'localhost',
user : 'root',
password : '',
database : 'address_book',
debug : false
});
function handle_database(req,res) {
pool.getConnection(function(err,connection){
if (err) {
connection.release();
res.json({"code" : 100, "status" : "Error in connection database"});
return;
}
console.log('connected as id ' + connection.threadId);
connection.query("select * from user",function(err,rows){
connection.release();
if(!err) {
res.json(rows);
}
});
connection.on('error', function(err) {
res.json({"code" : 100, "status" : "Error in connection database"});
return;
});
});
}
app.get("/",function(req,res){-
handle_database(req,res);
});
app.listen(3000);
Reference : https://codeforgeek.com/2015/01/nodejs-mysql-tutorial/

Answer 5

KnexJs can be used as an SQL query builder in both Node.JS and the browser.
I find it easy to use. Let try it - Knex.js
$ npm install knex --save
# Then add one of the following (adding a --save) flag:
$ npm install pg
$ npm install sqlite3
$ npm install mysql
$ npm install mysql2
$ npm install mariasql
$ npm install strong-oracle
$ npm install oracle
$ npm install mssql
var knex = require('knex')({
client: 'mysql',
connection: {
host : '127.0.0.1',
user : 'your_database_user',
password : 'your_database_password',
database : 'myapp_test'
}
});
You can use it like this
knex.select('*').from('users')
or
knex('users').where({
first_name: 'Test',
last_name: 'User'
}).select('id')

Answer 6

Imo, you should try MySQL Connector/Node.js which is the official Node.js driver for MySQL.
See ref-1 and ref-2 for detailed explanation.
I have tried mysqljs/mysql which is available here, but I don't find detailed documentation on classes, methods, properties of this library.
So I switched to the standard MySQL Connector/Node.js with X DevAPI, since it is an asynchronous Promise-based client library and provides good documentation.
Take a look at the following code snippet :
const mysqlx = require('#mysql/xdevapi');
const rows = [];
mysqlx.getSession('mysqlx://localhost:33060')
.then(session => {
const table = session.getSchema('testSchema').getTable('testTable');
// The criteria is defined through the expression.
return table.update().where('name = "bar"').set('age', 50)
.execute()
.then(() => {
return table.select().orderBy('name ASC')
.execute(row => rows.push(row));
});
})
.then(() => {
console.log(rows);
});

Answer 7

You can also try out a newer effort known as Node.js DB that aims to provide a common framework for several database engines. It is built with C++ so performance is guaranteed.
Specifically you could use its db-mysql driver for Node.js MySQL support.

Answer 8

connect the mysql database by installing a library. here, picked the stable and easy to use node-mysql module.
npm install mysql#2.0.0-alpha2
var http = require('http'),
mysql = require('mysql');
var sqlInfo = {
host: 'localhost',
user: 'root',
password: 'urpass',
database: 'dbname'
}
client = mysql.createConnection(sqlInfo);
client.connect();
For NodeJS mysql connecting and querying example

Answer 9

You can skip the ORM, builders, etc. and simplify your DB/SQL management using sqler and sqler-mdb.
-- create this file at: db/mdb/setup/create.database.sql
CREATE DATABASE IF NOT EXISTS sqlermysql
const conf = {
"univ": {
"db": {
"mdb": {
"host": "localhost",
"username":"admin",
"password": "mysqlpassword"
}
}
},
"db": {
"dialects": {
"mdb": "sqler-mdb"
},
"connections": [
{
"id": "mdb",
"name": "mdb",
"dir": "db/mdb",
"service": "MySQL",
"dialect": "mdb",
"pool": {},
"driverOptions": {
"connection": {
"multipleStatements": true
}
}
}
]
}
};
// create/initialize manager
const manager = new Manager(conf);
await manager.init();
// .sql file path is path to db function
const result = await manager.db.mdb.setup.create.database();
console.log('Result:', result);
// after we're done using the manager we should close it
process.on('SIGINT', async function sigintDB() {
await manager.close();
console.log('Manager has been closed');
});