android - How to get the key from the value in firebase

Question

How do I get the key "-KLpcURDV68BcbAvlPFy" when I know the field "name" contains "efg" in the following structure in Firebase.

clubs
    -KLpcURDV68BcbAvlPFy
        dept: "abc"
        desc: "xyz"
        name: "efg"
    -asdasdasddsad
        dept: "asda"
        desc: "asd"
        name: "adddd"

I tried this but it returned "clubs"

mDatabase.child("clubs").orderByChild("name").equalTo("efg").addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            String clubkey =dataSnapshot.getKey();

Answer 1

Waitting for answers