nodejs mysql

var mysql = require(‘mysql‘;

var connection = mysql.createConnection({
    host: ‘‘,
    port: 3306,
    user: ‘root‘,
    password: ‘root‘,
    database: ‘testdb‘
});

connection.connect(function(err){
    if(err) console.log(‘err‘);
    else{    // connection.query(‘select * from suers where sex=:sex‘, {sex:1}, ...
         connection.query(‘select * from users where sex=?‘, [1], function(err2, rows){
              if(err2) console.log(‘query error‘);
              else {                  console.log(rows);                  connection.end();　　　　　　　　}
        });
    }
});