How is a data warehouse different from a data mart? What will ...

[robinn137]

How is a data warehouse different from a data mart?
 
  What will be an ideal response?

Question 2

________ decisions are those that support day-to-day activities, such as the number of widgets to order from a particular vendor.
 
  A) Managerial
  B) Tactical
  C) Strategic
  D) Operational

[mcni194]

Answer to Question 1

A data warehouse can be compared to a distributor in a supply chain. The data warehouse takes data from the data manufacturers (operational systems and other sources), cleans and processes the data, and locates the data on the shelves of the data warehouse. The data analysts who work with a data warehouse are experts at data management, data cleaning, data transformation, data relationships, and the like. The data warehouse then distributes the data to data marts.
A data mart is a data collection, smaller than the data warehouse that addresses the needs of a particular department or functional area of the business. If a data warehouse is the distributor in a supply chain, then a data mart is like a retail store in a supply chain. Users in a data mart obtain data that pertain to a particular business function from a data warehouse. Such users do not have the data management expertise that data warehouse employees have, but they are knowledgeable analysts for a given business function.

Answer to Question 2

D