Derby Quick Start

What is Apache Derby?

  • Derby has a small footprint – about 3.5 megabytes for the base engine and embedded JDBC driver.
  • Derby is based on the Java, JDBC, and SQL standards.
  • Derby provides an embedded JDBC driver that lets you embed Derby in any Java-based solution.
  • Derby also supports the more familiar client/server mode with the Derby Network Client JDBC driver and Derby Network Server.
  • Derby is easy to install, deploy, and use.

Embedded Derby

  • SimpleApp

A quick look at the code

Load the Embedded JDBC Driver

The SimpleApp application loads the Derby Embedded JDBC driver and starts Derby up with this code:

public String driver = "org.apache.derby.jdbc.EmbeddedDriver";
...
Class.forName(driver).newInstance();

Get an Embedded Connection

The SimpleApp application creates and connects to the derbyDB database with this code:

public String protocol = "jdbc:derby:";
...
conn = DriverManager.getConnection(protocol + "derbyDB;create=true", props);

That embedded connection URL, fully constructed, looks like this:

jdbc:derby:derbyDB;create=true

Shut Derby down

Code to shut down a specific database looks like this:

DriverManager.getConnection("jdbc:derby:MyDbTest;shutdown=true");

Code to shut down all databases and the Derby engine looks like this:

DriverManager.getConnection("jdbc:derby:;shutdown=true");

IDEA

  1. Database
  2. New -> Data Source -> Derby
  3. Name: derbydb
  4. General -> Path: D:\code\derbydb, Driver: Derby (Embedded)
  5. Schemas -> SA