JDBC (Java Database Connectivity) ... Step 5. Query the database. With the live connection object in hand, we can do something useful, like querying the database.

How to connect Java to a PostgreSQL database. The steps required to connect a Java application to a PostgreSQL database follow the same pattern as other databases such as MySQL, SQLite and Microsoft's ...

But don't try to connect to them with JDBC in Java. It is only for relational databases, so stick with the Apache Derby and MySQL instances. JDBC connections are expensive. When you learn how to ...