PostgreSQL documentation (opens in a new tab)
The official reference for the tools used in this lesson.
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Normalisation and when to break it
Normalising removes duplicated truth. Denormalising trades that safety for read speed, and should be a decision rather than an accident.
Lesson 2.13m 33sIntermediate10k students
Lesson length
3:33What this lesson covers
- Remove duplicated data and update anomalies
- Recognise when denormalisation is justified
- Model many-to-many relationships properly
This lesson sits in Schema Design, part of PostgreSQL for Developers. It assumes what came before it and leads directly into the next lesson in the module.
In this lesson you will
- Remove duplicated data and update anomalies
- Recognise when denormalisation is justified
- Model many-to-many relationships properly
Resources
Personal notes are coming soon.