Fact Tables - CRM - Customer X Events

I am new in DW and开发者_运维知识库 I have a simple question. Imagine that I want to create a DW to analytical CRM.

I have a fact table called Event and I have a dimension called Customer.

The problem is. One event can have N Customers, and one Customer can be in N events.

So the relation between Customer(dimension) and Events(fact) are NxN. Is that schema is correct? If not, what schema will be better for this case?

In essence a fact table is a many-to many table in between dimensions. So in your case,

• Event table is a dimension table.

OR

• There is another fact table Event Participation which shares some dimensions with the Event or has the EventSequenceNumber as a degenerate dimension.