Question - Explain the ETL cycles three-layer architecture.
Answer -
ETL stands for extraction transformation and loading, so there are three phases involved in it – the primary is the staging layer, then the info integration layer, and the last layer is the access layer. So these are the three layers that are involved for the three specific phases within the ETL cycle, so within the staging layer, it’s used for the info extraction from various data structures of the source, within the data integration layer, data from the staging layer is transformed and transferred to the info base using the mixing layer the data is arranged in hierarchical groups often mentioned as dimensions facts or aggregates during a data warehousing system the mixture of facts and dimension tables is called a schema so basically within the data integration layer, once the info is loaded and data extracted and transformed within the staging layer and eventually the access layer where the info is accessed and may be loaded for further analytics.