Technical GlossaryData Engineering and AI Infrastructure

Aggregate Table

A table structure that stores summarized results derived from detailed data in order to accelerate analytical queries.

Aggregate tables prevent the same summary calculations from being executed repeatedly over high-volume detailed data. Summaries such as daily sales totals, monthly active customers, or regional performance can be stored in these structures. This improves dashboard performance and user experience. However, freshness, refresh cadence, and semantic correctness must be managed carefully.

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ETL

A classic data integration approach in which data is extracted from source systems, transformed, and then loaded into a target analytical environment.

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ELT

A modern approach in which data is loaded into the target platform first, and transformations are performed later inside the storage or compute layer.

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Reverse ETL

An integration approach that moves curated data from analytics platforms back into operational systems.

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Aggregate Table

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