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asked on 9/9/2013

Identifying relationship vs Mandatory non Identifying relationship

Hi Expert,

I'm confused for those two relationships, please explain,

Attached a file.

thanks in advance.
Doc1.docx

Databases Microsoft SQL Server Microsoft SQL Server 2008

Last Comment

9/9/2013

9/9/2013

Identifying relationship is manadatory rel. that has to be present in both parent and child and that other attributes of the both entities rely on

9/9/2013

here:
http://stackoverflow.com/questions/5579426/mandatory-and-non-mandatory-in-non-identifying-relationships

9/9/2013

http://stackoverflow.com/questions/762937/whats-the-difference-between-identifying-and-non-identifying-relationships

9/9/2013

in erwin:
http://erwin-concept.blogspot.com/2010/01/what-is-difference-between-identifying.html

9/9/2013

http://www.datanamic.com/support/relationshiptypes.html

9/9/2013

ex. of mandatory non-identifying:
http://www.nwcg.gov/var/glossary/mandatory-non-identifying-relationship

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9/9/2013

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9/9/2013

in the ex. above both can be mandatory ,1 is non-identifying

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