From the DWHPro archive
Optimizing Join and Aggregation with Teradata UNION ALL Views
A different way to handle rows combined with UNION ALL in views and derived tables, and the resources it saves.
Also worth reading: Teradata SQL Tuning and Query Rewriting
— Roland
Written by Roland Wenzlofsky — 25 years on enterprise data platforms, author of Teradata Query Performance Tuning.
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