First, let's understand what is ETL. This notation stands for Extract-Transform-Load. For large-scale firms, initially, the data is extracted from the source systems and then transformed into specific data types and, ultimately, loaded into a distinct repository. And this process should be tested efficiently to make sure that the data is managed properly in the warehouse.
What Does Testing of ETL Refer To?
It is a procedure that tests the withdrawal of data for further transformation, authentication of data during the transformation stages, and loading or filling of data in the endpoint.