The typical extract, transform, load (ETL)-based data warehouse uses staging, data integration, and access … See more

A data warehouse maintains a copy of information from the source transaction systems. This architectural complexity provides the opportunity to:
• Integrate data from multiple sources into a single data… See more

The environment for data warehouses and marts includes the following:
• Source systems that provide data to the warehouse or mart;
• Data integration technology and processes that are needed to prepare t… See more

A data mart is a simple form of a data warehouse that is focused on a single subject (or functional area), hence they draw data from a limited number of sources such as sales, finance or marketing. Data marts are o… See more

The concept of data warehousing dates back to the late 1980s when IBM researchers Barry Devlin and Paul Murphy developed the "business data warehouse". In essence, the data warehousing concept was intend… See more

A fact is a value, or measurement, which represents a fact about the managed entity or system.
Facts, as reported by the reporting entity, are said to be at raw level; e.g., in a mobile telephone s… See more

In the bottom-up approach, data marts are first created to provide reporting and analytical capabilities for specific business processes. These data marts can then be integrated to create a comprehensive data warehouse… See more