Deleting Row From Table

Hi guys,

I have a table which consist of 6,185 rows and from this table I want to delete 427 rows. I have placed the 427 rows in a separate table. So how do I delete these 427 from the original table(6185 rows).

I should also mention that the table does not have a primary key so I was thinking about something like this but it didn't work


delete o.CardNumber
,o.ref_no
,o.tran_date
,o.tran_val

from test6185 o

where exists (select h.CardNumber
,h.ref_no
,h.tran_date
,h.tran_val
from test427 h
where( h.ref_no=o.ref_no and
h.CardNumber = o.CardNumber and
h.tran_date =o.tran_date and
h.tran_val =o.tran_val
))

order by cardnumber


Thank much for any help