4min chapter

Elixir Wizards cover image

Marcelo Dominguez on Command and Query Responsibility Segregation

Elixir Wizards

CHAPTER

CQRS - What's the Difference?

In the CRUD methodology, you would create everything together and then read it separately. In CQRS or CQRS, you're kind of like writing the log as the primary. It's not really a log per se, but like an event stream. And then whenever you're querying the data, it comes either off of that stream directly or from something called an aggregate.

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