Update statement in Realm android

Question

How should i update a already existing value using realm DB in android?

I have been trying to update it but it is adding as a new value only not overwritting it

Answer 1

Realm realm = Realm.getDefaultInstance();
    OrderedRealmCollection orderedRealmCollection = 
             realm.where(Practice.class)
            .contains("key", "matchig value")
            .findAll();

    if(orderedRealmCollection.size()!=0){
        Practice practice = orderedRealmCollection.first();
        Realm.getDefaultInstance().executeTransaction(new Realm.Transaction() {
            @Override
            public void execute(Realm realm) {
                practice.setUpdate_practice_steps(""+steps);
                realm.insertOrUpdate(practice);
            }
        });
    }