<aside> 💡 The slides for this lecture can be found here.

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Abstraction

Abstraction is the process of representing essential features without including the background features.

Data

Data is the foundation of an information system.

Relational Data Modelling

Relational Data Modelling is a classic form of modelling data in which every object and entity relates to each other using a set of rules and keys.

ERDs

There are a few key parts of an ERD.

The different cardinalities.

The different cardinalities.