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    Prepare an example on how time-variant data can be properly captured and maintained within a database system.

    “Preparing an Adequate Data Model” Please respond to the following:

    • Using  specialization hierarchies can provide an efficient application  development structure. Justify the use of surrogate primary keys for a  database design. Provide an example to support your response.
    • Historical  data can be important to measuring performance. Prepare an example on  how time-variant data can be properly captured and maintained within a  database system.

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