what is the best way to compare variables of same class?

I have a class with variables for old data and new data.

Example:

class Person{

    String newAddress;
    int newMobileNumber;
    String newOfficeId;
    // many fields like this (atleast 15 fields)

    String oldAddress;
    int oldMobileNumber;
    String oldOfficeId;
    // many fields like this (atleast 15 fields)

    //getters and setters of all the fields.
}

What I am doing is on click of button storing old data and new data in a table consisting column with the same name as that of fields(for keeping track of old data)

But if all the oldFields are equal to newFields I want to avoid to avoid database operation.

one way of doing this is using many if conditions. like this,

if(oldAddress.equals(newAddress)){
  flag = true;
}
if(oldMobileNumber.equals(newMobileNumber)){
  flag = true;
}

So I'll need many such if() ,I don't find this solution that good. How can I do this in a better way?