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What are ETL Processes

GlossaryData Science

Extract, transform and load workflows that move data from sources into usable analytical systems.

Definition

ETL Processes is extract, transform and load workflows that move data from sources into usable analytical systems. In practical AI work, it helps teams connect a concept to data, model behavior, product choices and evaluation. The useful question is not only what the term means, but how it affects quality, cost, reliability and risk in a real workflow.

Example

An analyst uses ETL Processes while preparing data, checking patterns and deciding whether a model is ready for a real workflow.

Why it matters

ETL Processes matters because extract, transform and load workflows that move data from sources into usable analytical systems can change how teams build, evaluate or choose AI systems.

How it works

Analysts inspect source data, choose metrics, compare patterns and validate whether the result supports the original question. For ETL Processes, the key is to connect the definition with input data, assumptions, measurable outcomes and deployment limits.

Where it is used

  • Used in analytics, dashboards, data quality checks, feature work, forecasting and model evaluation.

Limitations

Visual or statistical results can look convincing even when source data is incomplete, biased or poorly defined.