Most applications need some form of persistence—a way to store the data outside the application for safekeeping. The most basic way is to write data to the file system, but that can quickly become a ...

The concept of database sharding has gained popularity over the past several years due to the enormous growth in transaction volume and size of business-application databases. This is particularly ...

Every JPA entity has a primary key, but some entities have more than one value as their primary key. In this case, you need to use a composite key. This Java tip introduces you to using composite keys ...

This post is one of a series that introduces the fundamentals of NOSQL databases, and their role in Big Data Analytics. What are key value databases? A key value database is a collection of paired ...