April 2026
Intermediate to advanced
580 pages
14h 12m
English
Content preview from AI-Ready PostgreSQL 18
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12
Transforming the Data for Analytics
Now that we have replicated the data from the transactional systems into our analytics environment, we must transform the data model from a normalized, transaction-optimized form to a star schema, optimized for analytics.
As a reminder, we differentiate between extract, transform, and load (ETL) and extract, load, and transform (ELT) approaches for moving data from transactional systems to analytical systems, and for optimizing the data model to enable easier, more efficient querying.
PostgreSQL is an excellent solution for transactions and analytics, providing tools for data replication and robust data transformation capabilities, enabling us to implement an ELT process without relying on third-party tools. ...
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