query help

I have a database of transaction data that includes "buyerID". Some buyers have bought multiple items within the time period that I'm looking at, but I just want one row (I don't care which row) for each unique buyerId.

"select distinct BuyerID from data" gets me a list of the unique buyer Ids, but I don't know how to get only one row for each Buyer ID. When I do

"select distict BuyerID, foo, bar from data" (foo and bar being other column names in the table) it return the original full data set.

If any one has any advice on how to solve my problem, I'd be much obliged.

Regards,
jonb

P.S. This is what I'd really like to be able to do

select * from data where SellerID is distinct

but it doesn't work

Thanks swampBoogie! I ended up doing this
_________________________________
insert into no_dupes_data
select *
from data as d
where ItemID in
(select min(ItemID) from data where BuyerId = d.BuyerId)
__________________________________

to grab the uniques and put them into a new table, and it seemed to work.

min(ItemID) is obviously getting the lowest ItemID. Is there a function that would grab a random ItemID? Not a big deal, but I wasn't specifically looking for the lowest ItemID, so that's a minor pollution of the dataset.