reading participation constraints in n-ary relationship from ER diagram

#1

Can someone explain what optional and mandatory participation means in
a ternary or higher relationship?
I am having bother finding a good explanation of it in textbooks/on
the web. All sources concentrate on the easier case of binary
relationships.

#2

Check out "Fundamentals of Database Systems" by Elmasri and Navathe. You can
also look for papers by Dr. Il-Yeol Song, by using these search terms in
Google:

IL-Yeol Song ternary

"Conor McMaugh" <conormcmaugh (AT) hotmail (DOT) com> wrote

Quote:

Can someone explain what optional and mandatory participation means in
a ternary or higher relationship?
I am having bother finding a good explanation of it in textbooks/on
the web. All sources concentrate on the easier case of binary
relationships.

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reading participation constraints in n-ary relationship from ER diagram

comp.databases.theory comp.databases.theory

reading participation constraints in n-ary relationship from ER diagram - 10-15-2003 , 05:32 PM

Re: reading participation constraints in n-ary relationship from ER diagram - 10-16-2003 , 09:04 AM