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Entity Relationship Diagrams

Posted on 2007-04-11
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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
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Question by:greg_c
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4 Comments
 
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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
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by:sujith80
ID: 18895995
Pls ignore the above post.
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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
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by:
taveirne earned 350 total points
ID: 18914952
if i had to guess:  --|-|-<
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