@Override
    String addValues() {
        String s = "VALUES(";
        
        for(int i = 0; i < valuesUsed.length; i++){
            if(i != valuesUsed.length-1)
                s += "'" + valuesUsed[i] + "', ";
            else
                s += "'" + valuesUsed[i] + "')";
        }
        
        return s;
    }