const con = require('./connect') function insertDB(barcode, shelving, level){ con.con.connect(function(err) { if (err) throw err; console.log("Connected!"); var sql = `INSERT INTO vn.smartTag (code, shelvingFk, level) VALUES (${barcode}, ${shelving}, ${level})`; con.con.query(sql, function (err, result) { if (err) throw err; console.log("1 record inserted"); }); }); }