How to write EXISTS subqueries with JPA and Hibernate
Introduction In this article, I’m going to show you how to write EXISTS subqueries with JPA and Hibernate. EXISTS subqueries are very useful as they allow you to implement SemiJoins. Unfortunately, many application developers are not aware of SemiJoins, and they end up emulating it using EquiJoins (e.g., INNER JOIN) at the cost of query performance.
The best way to use the Spring Transactional annotation
Introduction In this article, I’m going to show you the best way to use the Spring Transactional annotation. This is one of the best practices I applied when developing RevoGain, a web application that allows you to calculate the gains you realized while trading stocks, commodities, or crypto using Revolut.
The best way to handle time zones in a Java web application
Introduction In this article, I’m going to show you what is the best way to handle time zones when developing a Java web application. I applied all these best practices while developing RevoGain, a web application that allows you to calculate the gains you realized while trading stocks, commodities, or crypto using Revolut.
