Q. In a data warehouse, where does the data come from?

View solution

Q. What challenge arises when integrating data from different operational systems?

View solution

Q. What role do external data sources play in data warehousing?

View solution

Q. What needs to be done with the source data before it can be stored in a data warehouse?

View solution

Q. What is the purpose of standardizing data elements in data integration?

View solution

Q. How does the nature of data in an operational system differ from data in a data warehouse?

View solution

Q. Why is historical data important in a data warehouse?

View solution

Q. How does the time-variant nature of data in a data warehouse contribute to its functionality?

View solution

Q. What is the primary purpose of data in a data warehouse?

View solution

Q. In a data warehouse, when are data updates commonly performed?

View solution

Q. How does the data update process differ between operational databases and data warehouses?

View solution

Q. In an operational system, where is data usually kept in terms of detail?

View solution

Q. Why do users in a data warehouse often start with summary data when querying for analysis?

View solution

Q. What does data granularity in a data warehouse refer to?

View solution

Q. What is the finer data granularity in a data warehouse?

View solution

Q. What is the single most important issue facing IT managers when considering data warehousing, according to Bill Inmon?

View solution

Q. Which approach focuses on individual departmental requirements and building departmental data marts?

View solution

Q. What is the main focus of the top-down approach in data warehousing?

View solution

Q. What does Bill Inmon's top-down approach emphasize?

View solution

Q. What are the advantages of the top-down approach?

View solution