javascript - unable to connect to database in nodejs? -

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I am reading and trying to connect to mysql database using node js. Here is my program 

  var mysql = require ('mysql'); Var connection = mysql.createConnection ({host: "localhost", user: "root", password: ""}}}); Connection.connect (); Connection.query ("Use the Exam"); Var strQuery = "select from chat"; Connectionkquery (Strccri, function (fault lines) {if (err) {throw Gden;} else {console.log (rows);}}) connection.destroy ();

I do not have an error, but no one is able to achieve output

wait for the program to execute your queries to 

  connection.destroy (for);

with 

  connection.end ();

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