Chapter 2 Flashcards
1
Q
What is more’s law
A
As time passes process speed increases but value decreases
2
Q
Why dataware house required
A
Data sets are increasing
3
Q
What is complex question
A
Join multiple tables but do not use primary keys in complex questions/queries
4
Q
What are intelligent enterprises
A
The companies who uses complex questions
5
Q
What is dataware house
A
A body that contains complete repository of historical corporate data extracted from transaction systems that is available for ad-hock access by knowledge workers.
6
Q
What is ad-hock queries
A
Queries created at run time
7
Q
What are knowledge workers
A
Decision makers
8
Q
In which situations, data removed in dataware house
A
- Data corrupt
- Data old or hard to store
