Data warehousing pdf free download

  • How do I download data warehouse?

    A data warehouse is a repository (data & metadata) that contains integrated, cleansed, and reconciled data from disparate sources for decision support applications, with an emphasis on online analytical processing.
    Typically the data is multidimensional, historical, non volatile.
    Data Warehouse Architecture.
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  • The data mining process relies on the data warehousing process.
    The major difference between data warehousing and data mining is that data warehousing is a technique to compile information inside the data warehouse and data mining is used for the extraction of the data.

How does data flow in a data warehouse?

Data flows to the dashboards in real time from the data warehouse

In many data warehouses, data also flows into specialized downstream decision support applications such as executive information systems (EIS) and data mining

The other more common flow of information is to proprietary multidimensional databases for OLAP

What is enterprise data warehouse (DW)?

The enterprise DW contains all the extracted and standardized historical data at the atomic data level

A DW addresses the needs of cross-functional information requirements of an enterprise

The data will remain in the warehouse until they reach the limit specified in the retention strategy

After that period, the data are purged or archived


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