Building the Data Warehouse

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clickstream data data generated in the Web environment that tracks the activity of the users of the Web site.

column a vertical table in which values are selected from the same domain. A row is made up of one or more columns.

Common Business Oriented Language (COBOL) a computer language for the business world. A very common language.

commonality of data similar or identical data that occurs in different applications or systems. The recognition and management of commonality of data is one of the foundations of conceptual and physical database design.

compaction a technique for reducing the number of bits required to represent data without losing the content of the data. With compaction, repetitive data are represented very concisely.

condensation the process of reducing the volume of data managed without reducing the logical consistency of the data. Condensation is essentially different from compaction.

contention the condition that occurs when two or more programs try to access the same data at the same time.

continuous time span data data organized so that a continuous definition of data over a span of time is represented by one or more records.

corporate information factory (CIF) the framework that exists that surrounds the data warehouse; typically contains an ODS, a data warehouse, data marts, DSS applications, exploration warehouses, data mining warehouses, alternate storage, and so forth

CPU central processing unit.

CPU-bound the state of processing in which the computer can produce no more output because the CPU portion of the processor is being used at 100 percent capacity. When the computer is CPU-bound, typically the memory and storage processing units are less than 100 percent utilized. With modern DBMS, it is much more likely that the computer is I/O-bound, rather than CPU-bound.

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