Expanding from conceptual to logical modeling
In the previous chapter, we used Kimball’s four-step methodology to develop a bus matrix and create a conceptual model based on the recorded information. Details that informed the bus matrix were gathered through workshops and discussions between the data team and experts on the business side, who could elucidate the business’s operational model and create a functional artifact—the conceptual diagram.
The following diagram shows the conceptual model as it looked at the end of the exercise:
Figure 8.1 – The final conceptual diagram from Chapter 7
Despite the obvious deficiencies, such as missing attributes and Snowflake-specific object properties, the conceptual diagram did not attempt to add any contextual detail on the functional relationships between the entities, such as subtypes and many-to-many associations.
To uncover the relevant fields that should be added to our model...
