Use the dblook utility to view all or parts of the Data Definition
Language (DDL) for a given database. 
To use the dblook utility, do one of the following:
- If you are relatively new to the Java programming language, follow the 
instructions in "Setting up your environment" in
Getting Started with Java DB to set the 
DERBY_HOME 
and JAVA_HOME environment variables and to add
DERBY_HOME/bin
to your path. Then use the following command:
dblook -d databaseURL [options] 
- If you are a regular Java user but are new to Derby, set the 
DERBY_HOME
environment variable, then use a java command to invoke the 
derbyrun.jar file (all on one line):
(UNIX) java [options] -jar $DERBY_HOME/lib/derbyrun.jar dblook
          -d databaseURL [options]
(Windows) java [options] -jar %DERBY_HOME%\lib\derbyrun.jar dblook
          -d databaseURL [options]
- If you are familiar with both the Java programming language and Derby, 
you have already set 
DERBY_HOME. 
Set your classpath to include the 
Derby
jar files. Then use a java command to invoke the 
dblook class directly.
java org.apache.derby.tools.dblook -d databaseURL [options]