Question

 

Discuss the role of ETL (Extract, Transform, Load) processes in data warehousing. Provide a detailed explanation of each phase and its importance. Illustrate your answer with examples of common tools used in ETL and the challenges that may arise during these processes.

08 May 2025
Answer :
Word Count : 508

ETL (Extract, Transform, Load) processes play a crucial role in data warehousing by enabling the movement of data from different sources to a central data warehouse. The ETL process ensures that data is not only collected from various sources but also cleaned, transformed, and loaded into the warehouse for analysis and reporting.

Extract: The first phase of ETL is extraction, where data is gathered from multiple sources, such as databases, flat files, APIs, or external systems. The primary challenge here is dealing with different ________ ________ _______ ______ __________ _______ ____ ____ _____ ______.
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