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A time stamp is a time value that is associated with a data value.

  • A.
    True
  • B.False

Answer: A

Correct answer: True

A time stamp records when a value applied, which is what makes a time-varying attribute possible: an employee’s salary is not one value but a series of values each with the period it held for. Storing history this way is how a database answers questions about the past rather than only the present.

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