This demo application showcases how distributed SQL can improve microservices architecture by providing a single, scalable database solution for polyglot persistence. The application is built on top of Kubernetes and uses YugabyteDB as the distributed SQL database, replacing the original polyglot persistence implementation with independent database instances. By leveraging distributed SQL, developers can simplify their development and operations workflows while achieving better performance, scalability, and availability. The demo application demonstrates how to deploy and integrate the application with Istio for service discovery and communication, and provides a starting point for building cloud-native applications that benefit from distributed SQL.