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Allen Browne - Microsoft MVP. Perth, Western Australia.
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"Burghew" <bu*****@mailinator.com> wrote in message
news:cp*********@news-dxb.emirates.net.ae...
I have 2 fields called document & Revision which contains the titles for
the documents to be stored in the databse it gets filled up as the user
enters them and the revison numbers associated with them.
1. What I need to do is to make sure that no duplicate entry is entered
for
document and if entered should have a different revison number. I cannot
make them both as the primary key bacause there may be times when both the
fields maybe null but the entry must be there in the database.
2. If the user types in an existing document then I need the revision
field
to be filled up with the current revision number after update.