ETL has three steps: Extract, which reads the data from the sources; Transform, which cleans and shapes it; Load, which writes it to the destination, such as a data warehouse. Each step must be tested, logged and reproducible.
ETL has three steps: Extract, which reads the data from the sources; Transform, which cleans and shapes it; Load, which writes it to the destination, such as a data warehouse. Each step must be tested, logged and reproducible.