Solved

Entity Relationship Diagrams

Posted on 2007-04-11
4
3,910 Views
Last Modified: 2013-11-15
Hi

I am currently drawing and ER diagram and am not sure about how to draw the diagram for the following: A bike must have at least 2 wheels but it may have more.  The  way that I would draw it is thus:

    BIKE-------< WHEELS (ie crows feet with no line)

Would anyone have a suggestion on this.

Greg
0
Comment
Question by:greg_c
  • 2
  • 2
4 Comments
 
LVL 27

Assisted Solution

by:sujith80
sujith80 earned 150 total points
ID: 18895973
I believe you can indicate the number on the crow's feet like:

BIKE --2-< WHEELS
0
 
LVL 27

Expert Comment

by:sujith80
ID: 18895995
Pls ignore the above post.
0
 
LVL 2

Expert Comment

by:taveirne
ID: 18914950
i dunno if there is a notation..  but it's not enforceable in the db anyway.  i would just do 1 to many
0
 
LVL 2

Accepted Solution

by:
taveirne earned 350 total points
ID: 18914952
if i had to guess:  --|-|-<
0

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I guess that all of us know that caching the data usually increase the performance, but I worried if all of us are aware about the risk that caching the data provides and how to minimize this.  That’s the reason why I decided to write this short art…
I annotated my article on ransomware somewhat extensively, but I keep adding new references and wanted to put a link to the reference library.  Despite all the reference tools I have on hand, it was not easy to find a way to do this easily. I finall…
Video by: Steve
Using examples as well as descriptions, step through each of the common simple join types, explaining differences in syntax, differences in expected outputs and showing how the queries run along with the actual outputs based upon a simple set of dem…
Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

25 Experts available now in Live!

Get 1:1 Help Now