Q. Why is it important to divide the whole load process into smaller chunks when loading the data warehouse?

View solution

Q. What is a key consideration when transporting load images to the data warehouse server from a different location?

View solution

Q. In the context of data loading, what is the primary difference between an "append" and a "load" operation?

View solution

Q. What happens during a "destructive merge" when the primary key of an incoming record matches the key of an existing record?

View solution

Q. How is "constructive merge" different from "destructive merge" in data loading?

View solution

Q. Which mode of applying data is used when the target table is already empty before loading?

View solution

Q. In which scenario during the initial load of a data warehouse table is the "load" mode typically used?

View solution

Q. What mode is appropriate for preserving the periodic nature of changes in incremental loads of a data warehouse?

View solution

Q. In which scenario is the "destructive merge" mode applicable when applying data to a data warehouse table?

View solution

Q. How are full refreshes different from initial loads in terms of data application modes?

View solution

Q. What are the two methods for maintaining a data warehouse and keeping it up to date after the initial load?

View solution

Q. When might a full refresh be a better option than an update for keeping a data warehouse up to date?

View solution

Q. What is the primary reason for converting production system keys to system-generated keys in the data warehouse?

View solution

Q. What is the key of the fact table in a data warehouse based on?

View solution

Q. What is the primary function of ETL (Extraction, Transformation, and Loading) in a data warehouse?

View solution

Q. Why is data extraction for a data warehouse an ongoing function carried out at very frequent intervals?

View solution

Q. What is the key difference between data loading in a data warehouse and data loading for a new operational system?

View solution

Q. What role do vendor tools play in the ETL process for data warehousing?

View solution

Q. What are the three main components of the ETL process?

View solution

Q. Why is data transformation in a data warehouse more complex than conversion functions for operational systems?

View solution