[AccessD] Edit contents of field.

I'm just not getting this. I have a 30,000 record table that I've imported.
The first field has a product number with 4 hyphens - like 12-34-567-8888. I
need to take the hyphens out of these product numbers. Hopefully with a
query. I have Access XP and need this to be simple and hopefully as easy as
possible. Any help would be appreciated.

Dee