All Questions
Tagged with data-modeling relationships
4
questions
0
votes
1
answer
452
views
What kind of Relations should I have in my E/R Diagram
I am trying to create an Entity/Relationship Chen Diagram for a new APP. Scope is simple enough.
I will have multiples types of users login through the same Login Form.
What I decided to do... Is ...
- 117
2
votes
3
answers
147
views
Many-to-many assignments in user system
I have a few software architecture/design questions related to a technically quite simple problem. We already have all the functionality implemented properly, however from a design perspective it is ...
- 129
4
votes
3
answers
238
views
ER diagram - feasibility of a requirement
I need to model the following requirement in an Entity-Relationship diagram.
"Customers place orders, which contain a list of products with their quantity and prices. A shipment is made when ...
- 49
24
votes
4
answers
83k
views
ERD: "many" vs "zero or many"/"one or many" crowfoot notation?
Background
I saw this figure describing the different crowfoot notations used in ERD:
I'm not able to find the difference between the "many" notation and the "zero or many. However I was able to find ...
- 565