FUNDAMENTALS OF COMPUTER

DATABASE FUNDAMENTALS

DATA WAREHOUSING AND DATA MINING

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
multidimensional model of data warehouse called as ____
A
data structure
B
table
C
data cube
D
tree
Explanation: 

Detailed explanation-1: -A multidimensional model views data in the form of a data-cube. A data cube enables data to be modeled and viewed in multiple dimensions. It is defined by dimensions and facts. The dimensions are the perspectives or entities concerning which an organization keeps records.

Detailed explanation-2: -A cube is a multidimensional structure that contains information for analytical purposes; the main constituents of a cube are dimensions and measures. Dimensions define the structure of the cube that you use to slice and dice over, and measures provide aggregated numerical values of interest to the end user.

Detailed explanation-3: -A data cube can also be described as the multidimensional extensions of two-dimensional tables. It can be viewed as a collection of identical 2-D tables stacked upon one another. Data cubes are used to represent data that is too complex to be described by a table of columns and rows.

Detailed explanation-4: -A data cube (also called a business intelligence cube or OLAP cube) is a data structure optimized for fast and efficient analysis. It enables consolidating or aggregating relevant data into the cube and then drilling down, slicing and dicing, or pivoting data to view it from different angles.

Detailed explanation-5: -Multidimensional data model in data warehouse is a model which represents data in the form of data cubes. It allows to model and view the data in multiple dimensions and it is defined by dimensions and facts. Multidimensional data model is generally categorized around a central theme and represented by a fact table.

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