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Unformatted text preview: The data is historical, and its size is getting bigger with time. New records with a time stamp are added when the source data are changed. Hence, there is a need to have enough storage space, especially when the changes are frequent. Due to the space limit, the management needs to decide at what age the data needs to be purged. Since the data must be current, the managers need to consider how often the data should be refreshed to reflect the changes. Kimball, R. (1998) The data warehouse lifecycle toolkit . NewYork: Wiley & Sons Inc. ....
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This note was uploaded on 12/23/2009 for the course DBST 663 taught by Professor Tba during the Spring '09 term at MD University College.
- Spring '09