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Stop 06 · SQL DatabasesTopics · 13/14

Database Design & ER Diagrams

Part of the Backend Developer Roadmap

In short

The process of planning your tables, columns, relationships and constraints before writing any code — Entity-Relationship diagrams are the standard way to visualize this.

How to learn this

  1. 1Draw an ER diagram for a small app (e.g. an e-commerce store) before building it.
  2. 2Practice identifying one-to-many and many-to-many relationships and how to model each.
  3. 3Review a real open-source project's database schema for design patterns.

More topics at this stop

Relational Database ConceptsSQL Basics (SELECT, INSERT, UPDATE, DELETE)JoinsIndexesNormalizationTransactionsACID PropertiesPostgreSQLMySQLConstraints & KeysViewsStored ProceduresMigrations

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