Data Integration and Governance

Mar 26, 2026 · Fundamentals

A Complete Guide to Data Warehouse Layering: ODS, DWD, DIM, DWS, and More

This article explains the purpose and benefits of data warehouse layering—ODS, DWD, DIM, DWS, DWT, and ADS—detailing each layer's responsibilities, design principles, storage options, and how strict layer calling conventions improve data traceability, reduce duplication, and simplify downstream analytics.