h2 database persists data but resets on application start

I have a basic test for an embedded database that I’m trying to get working for a java project. As it stands now I am able to save rows to the database with my entity repository object, and after the …

Do foreign keys in apache derby automatically populate a column?

Recently I’ve been trying to create a RDB, and the problem I’m running into is that the columns I have with a foreign key constraint will not populate with the values of the referenced column (it will …

Highest Performance Database in Java

I need ideas to implement a (really) high performance in-memory Database/Storage Mechanism in Java. In the range of storing 20,000+ java objects, updated every 5 or so seconds. Some options I am open …