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A3.2 Database designA3.2.7

Evaluate the need for denormalizing databases

Evaluate the need for denormalizing databases

SL + HL≈ 45 minCommand term: EvaluatePremium

In this lesson

  • What denormalisation is, and the main ways it is done
  • The advantages and disadvantages of normalised and denormalised designs
  • When denormalisation improves performance, especially in read-intensive applications

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What's inside

  1. LearnWhat denormalisation is
  2. LabRead-heavy or update-heavy?
  3. LearnWeighing it up
  4. CheckWhich design fits?
  5. ExamWorked exam answer
  6. ReviewMistakes examiners see
  7. Exam practiceExam-style questions

Ends with 5 exam-style questions worth 17 marks, with a self-marking markscheme.