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When building a database from an existing set of tables, we may safely assume that there are no multivalued dependencies in the data we are given.

  • A.True
  • B.False

Answer: B

Correct answer: False

Nothing about received data guarantees the absence of multivalued dependencies; the tables were designed by someone else, possibly with no normalization at all. Their presence must be established by examining the data and understanding what it means, and where one is found the relation should be split so that each holds a single theme.

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