Alex Merced 2/19/2026

Data Virtualization and the Semantic Layer: Query Without Copying

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This article details the concept of data virtualization, which allows querying data directly at its source, eliminating the need for ETL pipelines. It explains how adding a semantic layer provides governance, consistent metric definitions, and access controls. The piece contrasts this approach with traditional data warehousing and discusses when to virtualize versus materialize data.

Data Virtualization and the Semantic Layer: Query Without Copying

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