Dimension Keys and Data Vault

In this session, we tackle one of the most common challenges in dimensional modeling: how to define dimension keys in a Data Vault environment. We break down the differences between Type 1 and Type 2 dimensions, weigh the pros and cons of hash keys versus sequence-based keys, and explain why hash values are often the better choice in distributed or hybrid architectures. We also explore how Type 2 dimension keys can be elegantly derived from PIT tables using a combined hash of the business key and snapshot date — enabling clean, single-column joins without sacrificing flexibility. Whether you're building on-premise, in the cloud, or across both, this discussion gives you a practical framework for making the right key decisions in your dimensional model. "Data Vault Friday", a new live session every week. Register now for the next session: https://scalefr.ee/datavault-friday Ask your questions in advance: https://scalefr.ee/dvf-question Read now for free "The Data Vault Handbook" https://scalefr.ee/data-vault-book #DataVault #DataVaultFriday #DimensionalModeling #DataWarehouse #BusinessIntelligence #BigData #DataEngineering #DataArchitecture #ETL #DataModeling #PITTable