Before revision: Extract, transform, load(ETL) methods are often used to duplicate or replicate the data from multiple disparate data system and transforming that data before consolidating and loading the transformed data it into a data hub type data system .
After revision: Extract, transform, load(ETL) methods are often used to duplicate or replicate the data from multiple disparate data system and transforming that data before consolidating and loading the transformed data it into a data hub type data system