A datawarehouse is updated on a regular basis using _________a.Data Integrationb.data cleaningc.ETL Processd.Data Transformation

To correctly fill in the blank regarding how a data warehouse is regularly updated, let's explore the options provided:

1. Data Integration: This refers to the process of combining data from different sources into a unified view, but it does not specifically focus on the regular update mechanism of a data warehouse.

2. Data Cleaning: This is the process of correcting or removing inaccurate, incomplete, or irrelevant data. While important, it does not represent the updating mechanism itself.

3. ETL Process: This stands for Extract, Transform, Load. It is a comprehensive process that covers the extraction of data from sources, transforming it into a suitable format, and loading it into the data warehouse. This is indeed how a data warehouse is regularly updated.

4. Data Transformation: This is a part of the ETL process focused on converting data into the appropriate format or structure but does not encompass the entire updating process.

Given this analysis, the correct answer is:

Final Answer

c. ETL Process