const con = mysql.createConnection({
  host: 'localhost',
  user: 'user',
  password: 'password',
  database: 'sitepoint'
});

con.query('SELECT * FROM records where flag = 0', (err,rows) => {
  if(err) throw err;
  rows.forEach( (row) => {
  someFunction(row, function(result,err){
     if(err) throw err;
     //Update record in db
}
});

});