A simple Q from a beginner
From: Hugo <damoncwk_at_hotmail.com>
Date: Mon, 2 Oct 2000 02:00:08 +0800
Message-ID: <8r7tui$13mu3_at_hkunae.hku.hk>
Date: Mon, 2 Oct 2000 02:00:08 +0800
Message-ID: <8r7tui$13mu3_at_hkunae.hku.hk>
Dear All,
If a doctor can prescribe several drugs for a patient. And a
patient can take drugs from several doctors . How is the ER Diagram look
like if every prescription of the same drug from the same doctor for the
same patient are to be recorded, i.e. not only the latest prescription is
recorded?
thx a lot.
Received on Sun Oct 01 2000 - 20:00:08 CEST