Maurice Tutor

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Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 23 Sep 2017 My Price 3.00

superkey

  1. Define the following terms: relation schema, relational database schema, domain, relation instance, relation cardinality, and relation degree.
  2. How many distinct tuples are in a relation instance with cardinality 22?
  3. Does the relational model, as seen by an SQL query writer, provide physical and logical data independence? Explain.
  4. What is the difference between a candidate key and the primary key for a given relation? What is a superkey?

Answers

(5)
Status NEW Posted 23 Sep 2017 12:09 AM My Price 3.00

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