Updating database with a webservice, but can I choose to not update a specific field?

Hello,

I was wondering if it was possible to do the following:

I have a webservice in a process model that pulls data and then saves it to the mySQL database.

Lets say the the first time the process model runs, it inserts this data in to the mySQL

ID: 101

Name: John

Color: Blue

Hair: Brown

Sport: Football

Address: 123 fake st.

Now, the next time the webservice runs, it returns this:

ID: 101

Name: John

Color: Blue

Hair: Brown

Sport: Baseball

Address: 808 heartbreak st.

Is there any way to update JUST the sport field, but NOT the Address field? For example, I want the database to always display the Address data value that it was when it was first inserted in to the database. Any other time the webservice returns a different value for ID 101, I do not want it to save to the database.

Of course, this is a fake scenario, but the general idea is there.

Can I update a database with a webservice and choose to not update a specific field after it has been initially inserted?

Thanks,