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one or more tables ?

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    #1

    one or more tables ?

    hello,

    I am a surgeon and responsible for our "bonebank". This would sound a little weird for some of you but this is the reuse of femoral heads from our total hip prosthesis patients in other patients.

    I am setting up a database for this. I have created it using 3 tables and linked the three relationally. But, is this the right way ?

    I need these fields:

    Information on the graft: size, prelevation date, serological tests OK, etc.

    Info on donor: name, number, birthdate, sex, etc.

    Info on acceptor: name, number, birthdate, sex, etc.


    Each graft comes from a donor. A donor can only deliver 2 grafts since he's only got 2 hips. A donor can receive a graft from another donor, so a donor can be an acceptor as well. The other way round is also true: an acceptor can be a donor as well.
    This means that the same donor will maximum appear two times in my graftlist.

    Right now i've made tables: grafts, donors, acceptors and put a donorID and acceptorID field in the grafts table and linked it to the donorID field in the donor table en acceptorID field in the acceptor table.
    I think i could make two tables: grafts, patients since i can link the field donorID in grafts to donorID or acceptorID in the patients table.

    Is this a good idea or should I just make one table with all the information in ?

    What do you think ?

    Thank you for your help!

    Olivier
    Tags: None
    #2
    Re: one or more tables ?

    Olivier,
    There are many ways and some simply depend on how you as a developer like to do things.

    I like to consolidate things. So I would only have two tables.

    Clients(or Patients)
    - - - with a field for "Type" of client: Acceptor, Donor, Donor and Acceptor

    Grafts

    The Clients table can be filtered showing whatever is wanted. If not done this way then I believe you would be looking at creating a Many-to-Many situation which is also doable but this makes it easier I feel in the long run.

    You would then only have ONE unique ID associated with each person.

    Maybe there's a better way but is the first thing I thought of! :)

    LATER:
    You could do it the way you suggested but would have to have a separate table for Donors and Acceptors instead of the one I would use. I think it easier to show all records associated with a Client (Patient) with them in the one table.
    Last edited by MikeC; 02-10-2008, 12:06 PM.
    Mike
    __________________________________________
    It is only when we forget all our learning that we begin to know.
    It's not what you look at that matters, it's what you see.
    Henry David Thoreau
    __________________________________________



    Comment

      #3
      Re: one or more tables ?

      Thank you Mike for your advice, ill go for the one patient database and grafts database... I'll show you the results when it's finished....

      Comment

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