Sounds like a data issue, so the answer depends on how you save data. You should create the old long address from the new data on save.

>My client used to have one big 'address field', and now they want in to input/maintain it split up. So they added fields called Streetnum (eg, 11200), Streetname (eg, Main), Streettyp (eg, St.). But, they want to keep the address field for backward-mobility purposes.
>
>As they type the split-up values, they want to see their old address field get filled in. Should I approach this as a form issue, or something at the database?
>
>Thanks.
>Humble newbie,
>Sylvia