Dimension/measure group relationships
So far we've seen dimensions either having no relationship with a measure group or having a regular relationship, but that's not the whole story: there are many different types of relationships that a dimension can have with a measure group. Here's the complete list:
- No relationship
- Regular relationship
- Fact relationship
- Referenced relationship
- Many-to-many relationship
- Data mining relationship
We'll discuss many-to-many relationships in the next chapter because they are an important topic on their own, but before that let's talk briefly about the relationship types we've not seen so far.
Fact or degenerate dimensions are, as we saw in Chapter 1, Designing the Data Warehouse for Analysis Services ...