ETL (Extract, Transform, Load)
A data pipeline pattern: extract from source, transform format, load to destination.
Full definition
ETL is the foundational pattern of data engineering. Extract pulls raw data from a source (database, API, web page). Transform cleans, normalizes, and enriches the data. Load writes the final result into a destination system (data warehouse, CRM, spreadsheet). Modern ETL tools automate the workflow and handle scheduling, retries, and monitoring.
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