In this tutorial we will code from zero to form a basic features of working cryptocurrency. Most of work meets minimal working requirement and aims for simplicity and easy understanding. This project ...

High traffic causes errors. You see connection timeout errors. Use HikariCP to manage your pool. Set a minimum idle size. Set a maximum pool size. Set an idle timeout. This keeps your system stable.

MySQL is a fully managed database service to deploy cloud-native applications using the world's most popular open source database. PostgreSQL is a powerful, open source object-relational database ...

You connect two tables like this: - client_id REFERENCES clients (id) tells Postgres to only allow values that exist in the clients table You can query related data together using JOIN. - JOIN pulls ...