What is extraction, transformation, and loading? Multiple Choice It is a process that extracts data from internal and external databases, transforms it using a common set of enterprise definitions, and loads it into a data warehouse. It is a process that is performed at the end of the data warehouse model prior to putting the data in a cube. It is a process of entering data, tracking data, and loading it into a database. It is a process that is performed at the beginning of the data mining model.