FUNDAMENTALS OF COMPUTER

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DATABASE FUNDAMENTALS

DATA WAREHOUSING AND DATA MINING

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The part of the Data Warehouse as a whole that is at the access layer is oriented towards specific business processes and the needs of the organizational unit where the Data Warehouse is implemented is
A
Multidimensional data
B
Data mart
C
Raw data
D
Data warehouse
Explanation: 

Detailed explanation-1: -System Operations Layer This layer includes information on how the data warehouse system operates, such as ETL job status, system performance, and user access history.

Detailed explanation-2: -A data mart is a subset of a data warehouse focused on a particular line of business, department, or subject area. Data marts make specific data available to a defined group of users, which allows those users to quickly access critical insights without wasting time searching through an entire data warehouse.

Detailed explanation-3: -A data mart is the access layer of the data warehouse environment that is used to get data out to the users. The data mart is a subset of the data warehouse and is usually oriented to a specific business line or team.

Detailed explanation-4: -A data mart is a subset of a data warehouse built to maintain a particular department, region, or business unit. Every department of a business has a central repository or data mart to store data.

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