Re: Designer 2000 and ternary relationships

In article <7mju0v$73i$1_at_nnrp1.deja.com>, owais_anjum_at_my-deja.com writes
>In article <ryBBKEAfbPj3Iwym_at_coalole.demon.co.uk>,
> Diane <Diane_at_coalole.demon.co.uk> wrote:
>> In article <7m4reo$9gu$1_at_nnrp1.deja.com>, owais_anjum_at_my-deja.com
>writes
>> >I have just started using Designer 2000 and the
>> >first component that I am using is the Entity
>> >Relationship Diagrammer.
>> >Is there a way to model ternary relationships and
>> >relational attributes in ER Diagrammer ?
>> >I am really stuck because most of my modeling
>> >involves such scenarios.
>> >
>> >Thanks and please don't say that it does not
>> >support these things are not supported !
>> >
>> >Owais Anjum
>> >
>> >
>> >Sent via Deja.com http://www.deja.com/
>> >Share what you know. Learn what you don't.
>> forgive the ignorance but what are ternary relationships?
>> --
>> Diane
>>
>
>When two entities participate in a relationship, its a BINARY
>relationship. (e.g. customer buys product)
>
>When three entities participate in one relationship, its a TERNARY
>relationship. (e.g. student takes course taught by teacher)
>P.S. that ternary relationships can not be modeled by replacing them
>with a series of binary relationships. All three entities HAVE to
>participate at the SAME time.
>
>For participation of above three, the term used is n-ary relationship.
>
>Owais
>
>
>Sent via Deja.com http://www.deja.com/
>Share what you know. Learn what you don't.
Thank you

-- 
Diane