Database Design: Normalization Note & Exercises (Up to 3NF)
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Questions and Answers

Which normalization form aims to eliminate transitive dependencies?

  • 1NF
  • 2NF
  • 3NF (correct)
  • 4NF
  • What is the major goal of relational database design?

  • Introduce update anomalies
  • Group columns into tables (correct)
  • Maximize data redundancy
  • Minimize file storage space
  • Which type of update anomaly occurs when extra data must be added to the database beyond the desired data?

  • Deletion anomaly
  • Modification anomaly
  • Insertion anomaly (correct)
  • Transitive anomaly
  • What happens when tables break the rules of 1NF, 2NF, and 3NF?

    <p>Data redundancy increases</p> Signup and view all the answers

    Why can tables with redundant data suffer from update anomalies?

    <p>They introduce inconsistencies into the database</p> Signup and view all the answers

    What is the primary key for the table that contains details of member of staff and branch?

    <p>staffNo</p> Signup and view all the answers

    Which type of anomaly occurs when deleting a row inadvertently causes other data to be deleted?

    <p>Deletion anomaly</p> Signup and view all the answers

    What must be known to insert a course (CourseNo) according to the text?

    <p>StdSSN and OfferrNo</p> Signup and view all the answers

    Which table contains redundant data causing update anomalies?

    <p>StaffBranch table</p> Signup and view all the answers

    What problem occurs when changing multiple rows to modify only a single fact?

    <p>Update anomaly</p> Signup and view all the answers

    What is the major aim of relational database design?

    <p>Minimizing data redundancy</p> Signup and view all the answers

    Which type of update anomaly occurs when extra data beyond the desired data must be added to the database?

    <p>Insertion anomaly</p> Signup and view all the answers

    What problem occurs when tables break the rules of 1NF, 2NF, and 3NF?

    <p>Update anomalies</p> Signup and view all the answers

    Which normalization form aims to eliminate transitive dependencies?

    <p>3NF</p> Signup and view all the answers

    Why can tables with redundant data suffer from update anomalies?

    <p>They introduce inconsistencies into the database</p> Signup and view all the answers

    What is the primary key for the table that contains details of member of staff and branch?

    <p>staffNo and branchNo</p> Signup and view all the answers

    What must be known to insert a course (CourseNo) according to the text?

    <p>Offering number</p> Signup and view all the answers

    Which normalization form aims to eliminate transitive dependencies?

    <p>Third Normal Form (3NF)</p> Signup and view all the answers

    What problem occurs when changing multiple rows to modify only a single fact?

    <p>Update anomaly</p> Signup and view all the answers

    Which type of anomaly occurs when deleting a row inadvertently causes other data to be deleted?

    <p>Deletion anomaly</p> Signup and view all the answers

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