Database creation failure, result Undefined - mysql

Question

I am trying to create a simple nodejs code using express and mysql.
const express = require('express');
const mysql = require('mysql');
const db = mysql.createConnection({
host : 'localhost',
user : 'admin',
password : ''
});
db.connect((err) => {
if(err){
console.log('Error while connecting');
}
console.log('Connected');
});
const app = express();
app.get('/createdb',(req, res) => {
let sql = 'CREATE DATABASE nodemysql';
db.query(sql,(err,result) => {
if(err){
console.log("error while creating database");
}
console.log('result: '+result);
res.send('database created..');
});
});
app .listen('4200',() => {
console.log('Server started on port 4200');
});
The response is sent to the browser that says
database created..
but the result it throws is undefined. Also the console that says
Error while creating database is printed
Error I am getting is
[nodemon] restarting due to changes...
[nodemon] restarting due to
changes... [nodemon] starting node index.js
Server started on port 4200
Connected error while creating database
result: undefined
I am not sure on what I am missing out. Please help.

Answer 1

Below code should work fine, try to execute the below code in a .js file. If it works, then we would be sure that nothing wrong in the conf part.
var mysql = require('mysql');
var con = mysql.createConnection({
host: "localhost",
user: "root",
password: "root"
});
con.connect(function(err) {
if (err) throw err;
console.log("Connected!");
con.query("CREATE DATABASE mydb", function (err, result) {
if (err) throw err;
console.log("Database created");
});
});

Answer 2

I am not an expert, but added the keyword 'function', like below:
app.get('/createdb',(req, res) => {
let sql = 'CREATE DATABASE nodemysql11';
db.query(sql, function(err,result) => {
if(err){
console.log("error while creating database");
}
console.log('result: '+result);
res.send('database created..');
});
});

Answer 3

Try this, it will work
app.get('/createdb',(req, res) => {
db.query('CREATE DATABASE nodemysql11', function(err,result) {
if(err){
console.log("error while creating database");
}
console.log('result: '+result);
res.send('database created..');
});
});

Answer 4

Try the below line and then run the .js file.
I assume u have done npm install mysql
mv ./node_modules/node-mysql/node_modules/* ./node_modules/