firebase get all rows

gistfile1.txt

// get all rows
  var query = firebase.database().ref("result").orderByKey();
  query.once("value")
    .then(function(snapshot) {
      snapshot.forEach(function(childSnapshot) {
        // key will be "ada" the first time and "alan" the second time
        var key = childSnapshot.key;
        // childData will be the actual contents of the child
        var childData = childSnapshot.val();
        console.log(childData)
    });
});