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Dimensional Modeling

Last updated Apr 12, 2024

Dimensional Modeling (DM), integral to the Kimball DW and BI Lifecycle Methodology, also known as Business Dimensional Lifecycle methodology, was developed by Ralph Kimball. It encompasses a suite of methods, techniques, and concepts essential for Data Warehouse design.

This approach emphasizes identifying and modeling key business processes initially and then progressively adding more processes. This bottom-up strategy contrasts with Inmon’s top-down approach, which involves designing an enterprise-wide data model using Entity-Relationship Modeling (ER) and other tools.

# Modeling Techniques:

# Frameworks:

# Key Components:

An insightful example from Slack (dbt Coalesce 2022 Conference):

Recommended Resource: What is Dimensional Modeling in Data Warehouse? Learn Types (also see readwise notes).

# Dimensional Modeling Process

Additional tasks in dimensional modeling include Snowflaking, Bridge tables, Roles, degenerate dimensions, heterogeneous dimensions, and more.

  1. Facts:

# Example

Introduced by Ralph Kimball in 1996 in his book, The Data Warehouse Toolkit, dimensional modeling aims to transform raw data into Fact and Dimension tables that effectively represent business operations.

From GitHub - Data-Engineer-Camp/dbt-dimensional-modelling: Step-by-step tutorial on building a Kimball dimensional model with dbt

The resurgence of data modeling, including dimensional modeling, is evident. It’s being discussed on social media, addressed in talks, and explored in recent publications like Joe Reis’s book on “modern” data modeling practices ( LinkedIn Post) and Serge Gershkovich’s insights on revitalizing Data Modeling ( LinkedIn Post).

Origin: Series- Building Airbyte’s Data Stack
References: Building Facts in a Dimensional Model
Created 2022-08-02