ontsjc,
The answer is: No. There is no way.
Baltman's suggestion about a .BAK file could provide you with some data, if the table's structure has been changed any time. The more recent the change, the better chance you have. You could recover it by renaming the file from .bak do .dbf and if it had any indexes on it, just rebuild them. Otherwise, if you didn't take a back-up, you're burnt. Unless you have a way of repopulating the field you just over-wrote through some other means, which depending on what you did, and what data was there, you may or may not be able to do. I would expect you are in panic mode at this point, so anything is prefereable to nothing.
The key here: ALWAYS, ALWAYS, ALWAYS make a back up of a table before issuing data destructive commands on it, just in case you muck it up. I have done this a few times, but fortunaly, it was when I was building a table off of other tables, and I just had to start my process over. Every once in a while you accidentally bank an enter key, or click a mouse button when you don't mean to, and disaster strikes. It's worse than spilling coffee in your keyboard.

Best of luck.
Best Regards,
Scott
"Everything should be made as simple as possible, and no simpler."
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