Question

what do you understand by the term data extraction ? explain with an example​

Answer 1

Explanation:

Data extraction is a process that involves retrieval of data from various sources. Frequently, companies extract data in order to process it further, migrate the data to a data repository (such as a data warehouse or a data lake) or to further analyze it. It’s common to transform the data as a part of this process. For example, you might want to perform calculations on the data — such as aggregating sales data — and store those results in the data warehouse.

Answer 2

Answer:

Data extraction is the act or process of retrieveng data out of ( usually unstructed or poorly structured ) data sources for future data processing or data storage (data migration)