DBMS-Data Warehousing and Data Mining

DBMS-Data Warehousing and Data Mining
1. In a data warehouse, data once loaded is not changed.
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2. Metadata is data about data
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3. A data warehouse is a collection of computer
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4. A data warehouse is a collection of computer-based information that is critical to successful execution of organisation's initiatives.
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5. Data in a data warehouse differ from operational jsystems data in that they can only be read, not modified.
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6. Data in a data ware house differ from operational systems data in that they can only be read, not modified.
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7. As the end-user computing was emerging, the computing started shifting from a business-driven information technology strategy to a data-processing approach.
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8. In the data warehouse structure, operational data and processing is completely separate from data warehouse processing.
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9. The ODS is often create when legacy operational systems are found to be incapablej of achieving reporting requirements.
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10. Once in production, data marts are difficult to extend for use by other departments.
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