a data warehouse is a quizlet centralized repository of integrated data from one or more disparate sources. It is used for reporting and data analysis and is considered a core component of business intelligence.
Data warehouses are designed to store and manage large amounts of data from multiple data sources, and allow users to access and analyze the data in an efficient and effective manner.
Q1: What is a data warehouse used for?
A1: A data warehouse is used for reporting and data analysis, and is considered a core component of business intelligence. It is designed to store and manage large amounts of data from multiple data sources, and allow users to access and analyze the data in an efficient and effective manner.
Q2: What are the components of a data warehouse?
A2: The components of a data warehouse include the data repository, the extraction, transformation, and loading (ETL) process, the data staging area, and the online analytical processing (OLAP) server.
Q3: How do you build a data warehouse?
A3: Building a data warehouse involves several steps, including planning, designing, building, and testing the system. The process involves extracting data from various sources, transforming it into a format that can be used for analysis, loading it into the warehouse, and ensuring that the data is accurate and up to date.
Q4: What are the benefits of a data warehouse?
A4: The benefits of a data warehouse include improved data accuracy and consistency, reduced costs associated with data storage, improved data security and privacy, improved decision-making capabilities, and increased efficiency.
Q5: What is the difference between a data warehouse and a database?
A5: The key difference between a data warehouse and a database is that a data warehouse is designed to store and manage large amounts of data from multiple data sources, while a database is designed to store and manage smaller amounts of data from one source.
Data warehouses are used for reporting and data analysis, while databases are used for transactional processing.
