ETL stands for Extract, Transform, Load. On the other hand, ETL testing refers to verifying the extracted data, transformation, and loading processes in a data integration environment or data warehouse. It prevents duplicate records and data loss. The ensuring of accuracy, completeness, and quality of data throughout the processes can be seen in ETL testing. The ETL testing involves a combination of both manual testing and automated testing using tools, which is designed for data validation and comparison.
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