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Re: Help: Many to Many relationships

From: Brian Peasland <peasland_at_edcmail.cr.usgs.gov>
Date: Tue, 22 Feb 2000 15:23:39 GMT
Message-ID: <38B2A9FB.98B6E80D@edcmail.cr.usgs.gov>


Peter,

  Unlike Access, Oracle doesn't care about the cardinality of your relationships. There is no way to specify a 1:1, 1:M, or M:N relationship in Oracle. So the answer to your question is that there is no joining table required. You can use one if you want though...

HTH,
Brian

Peter Mount wrote:
>
> Hello
>
> I have just recently started to learn Oracle at my school.
>
> I just need to know if Oracle handles Many to Many relationships in the ER
> Diagram (as part of the Data Modelling process) in the same way as MS
> Access - i.e. with a joining table in between the two tables with the many
> to many relationship with each other.
>
> Thanks
>
> Peter Mount
> pmount_at_optusnet.com.au

--



Brian Peasland
Raytheons Systems at
  USGS EROS Data Center
These opinions are my own and do not
necessarily reflect the opinions of my company!
Received on Tue Feb 22 2000 - 09:23:39 CST

Original text of this message

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