The new Java version 16 includes a new feature: Records

Today databases have a lot of functionality that is often not used by software developers because they simply do not know that this exists.
But knowing about these features can save a lot of time because you may write less code.

When using grids, trees, or any other of the multi-valued component with Vaadin you often want to display data from a database table, and typically you have more than a few rows in the database.
In this case loading, thousands or even millions of records don’t make sense and would be a huge performance problem.

No matter if you are using frameworks like JPA, MyBatis or Spring Data JDBC you always end up declaring the SQL statements as a Java String.

When it comes to accessing relational databases with Java, people usually think of two options: SQL or ORM

If you are working with Spring Boot there are several ways to initialize the database.

Often you don’t want to map all relationships in an entity model (a blog post about this topic in detail will follow).

Relational databases have tables and columns and object-oriented programming languages have classes and fields but they also provide inheritance.

With JPA it’s possible to map Java enums to columns in a database table using the Enumerated annotation.