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Tagged with data-modeling attributes
2
questions
-1
votes
2
answers
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How to change a data model
In my model a user entity has three attributes : ID, name, hasBoyfriend.
I want now to change hasBoyfriend to boyFriendsNames which is an array of names .
The user entity is used by many services.
The ...
- 1,159
5
votes
2
answers
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How multi-valued and derived attributes are denoted in crow foot's notation of ERD?
In Chen notation multi-valued attributes are denoted by double eclipse(oval) and derived attributes are denoted by dotted eclipse(oval), but how they are denoted in crow foot notation?
Also how ...
Saif Ullah