What is the difference between CQS and CQRS?

Can you explain the difference between CQS and CQRS?

Sure! CQS stands for Command Query Separation, which means that a method should either be a command that changes state or a query that retrieves data, but not both. CQRS, or Command Query Responsibility Segregation, takes this further by separating the models used for reading data from those used for writing data.

Why would I use CQRS over CQS?

CQRS is beneficial in complex applications where read and write operations have different requirements. It allows for optimized data models and can improve performance and scalability.

Are there any downsides to using CQRS?

Yes, CQRS can introduce complexity in your application architecture. It may require more infrastructure and can be overkill for simpler applications.

Can you give an example of when to use CQS?

Certainly! CQS is useful in scenarios where you want to maintain a clear separation of concerns, such as in a simple CRUD application where methods are clearly defined as either commands or queries.