connection.escape

var mysql = require('mysql'); var connection = mysql.createConnection({    host: 'localhost',    user: 'root',    password: '',    database: 'technicalkeeda',    debug: false,});connection.connect(); var employeeId = '1';var sql = "SELECT * FROM trn_employee WHERE employee_id = " + connection.escape(employeeId); connection.query(sql, function(error, results, fields) {    if (error) {        throw error;    }    console.log(results);}); connection.end();