2

I have a question about a UML class diagram. Do many to many relationships have a junction table like in ERD diagrams or not? it would make sense for me having a junction table to put the quantity of items in there. Here is what I have but without a junction tableenter image description here

Improve this question

1 Answer 1

Reset to default
2

Sure there is. And it's called associaton class. The notation is like this:

enter image description here

This is a shortcut for

enter image description here

The OrderItem relates Item and PurchaseOrder by adding what ever needed (quantity, rebate, etc.) to it.

Improve this answer
Sign up to request clarification or add additional context in comments.

Comments

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.