December 2006
Beginner to intermediate
864 pages
26h 22m
English
book
Microsoft SQL Server 2005 Analysis Services
by Edward Melomed, Irina Gorbach, Alexander Berger, Py Bateman
Content preview from Microsoft SQL Server 2005 Analysis Services
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FIGURE 22.1 Data is moved from the OLTP system into the multidimensional model.
Figure 22.1 shows the typical ETL process of moving data from the OLTP system through
the data warehouse to the multidimensional model. It also shows the ETL direct load
process in which SSIS pipes data from nonrelational data sources directly into the multidi-
mensional model. The ETL direct load process is helpful in the following situations:
• You have to load data from nonrelational data sources, such as web logs, XML docu-
ments, flat files, and so on.
• The data warehouse schema is complex and not well suited to map to a multidi-
mensional model.
• The data needs cleaning, ...
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