CQRS stands for Command Query Responsibility Segregation. CQRS is an architectural pattern created by Greg Young, based on Bertrand Meyer's Command and Query Separation principle.
Greg Young, the father of CQRS, coined this term. The CQRS pattern was inspired by the Command Query Separation (CQS) technique.
Wikipedia defines this CQS as follows:
We know that every system or application has two kinds of ...