DATABASE FUNDAMENTALS
DATA WAREHOUSING AND DATA MINING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Data warehouse is volatile, because obsolete data are discarded
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TRUE
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FALSE
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -After data are entered into a data warehouse, users cannot change or update the data. Obsolete data are discarded, and changed are recorded as new data.
Detailed explanation-2: -A data warehouse is a subject-oriented, integrated, time-variant and non-volatile collection of data in support of management’s decision making process.”
Detailed explanation-3: -Answer) c. The data warehouse does not replace the need for all other reporting systems within an organization.
Detailed explanation-4: -Nonvolatile means that, once entered into the warehouse, data should not change. This is logical because the purpose of a warehouse is to enable you to analyze what has occurred.
There is 1 question to complete.