data exploration techniques correct answers -Online Analytical Processing (OLAP)
-MOLAP + MDBMS
how data must be stored correct answers -data must be first aggregated
-it must be summarized
-must be able to extract data quickly without a massive table
OLAP correct answers -aggregates infor...
ITSS 4351 Exam 1 || with Error-free Solutions.
data exploration techniques correct answers -Online Analytical Processing (OLAP)
-MOLAP + MDBMS
how data must be stored correct answers -data must be first aggregated
-it must be summarized
-must be able to extract data quickly without a massive table
OLAP correct answers -aggregates information from multiple systems
-stores in multi-dimensional format
-uses star schema and show flak schema concepts to store the data
-a technique can be used to slice and dice information for interrogation
why OLAP correct answers -data warehouse stores tactical information that answers for who,
what regarding past events
-ability to answer the what if and why questions
-enable decision making about future decisions
-transforms data into strategic information
star schema correct answers A data modeling technique used to map multidimensional decision
support data into a relational database
-called its name because diagram has points radiating from center
-provides logical view for multidimensional data models
components of star schema correct answers - facts
- dimensions
- attributes
- attribute hierarchies
fact table correct answers facts of a particular business process or interests used for strategic
decisions
-numeric figure used for measurement or metric of business process
attributes correct answers -used to provide descriptive characteristics about facts from dimension
table
-often used to search, filter, classify facts using dimension tables
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