Using the ij Tool : Java DB Derby « Database « Java Tutorial

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Java Tutorial » Database » Java DB Derby

20. 37. 11. Using the ij Tool

The ij tool enables you to connect to a running JavaDB server and execute scripts and queries against a database.

The command to use the ij tool is:


java �jar derbyrun.jar ij

Commands of the ij Tool

Command	Description
Driver	Loads the specified JDBC driver.
Protocol	Sets the specified protocol to use for connecting to a database.
Connect	Establishes a connection with a database.
Set Connection	Switches from the existing connection to a different connection specified with a connection name.
Show Connections	Lists all active connections.
Disconnect	Disconnects the current connection, a connection specified by a connection name, or all active connections.
Show Schemas	Lists all schemas present in the current database.
Show Tables	Lists all tables present in the current database.
Show Views	Lists all views present in the current database.
Show Procedures	Lists all stored procedures present in the current database.
Show Indexes	Lists all indexes present in a specified table.
Describe	Displays information about columns, such as column name and data type, for a specified table.
Commit	Commits the current transaction.
Rollback	Rolls back the current transaction.

20. 37. Java DB Derby
	20. 37. 1.	New to Java 6 is a lightweight database called Derby.
	20. 37. 2.	The JavaDB Directory Structure
	20. 37. 3.	The JavaDB Environments
	20. 37. 4.	JavaDB Drivers
	20. 37. 5.	JavaDB URLs
	20. 37. 6.	JavaDB Tools
	20. 37. 7.	You can use the server tool to start JavaDB in a network client environment.
	20. 37. 8.	Ping JavaDB.
	20. 37. 9.	To view run time information for JavaDB, you can use the following command:
	20. 37. 10.	To stop JavaDB, you can use the following command:
	20. 37. 11.	Using the ij Tool
	20. 37. 12.	You can use the connect command of ij to establish a connection with a database
	20. 37. 13.	Viewing and Switching Connections
	20. 37. 14.	Working with Tables
	20. 37. 15.	To view the structure of the Employee table
	20. 37. 16.	Using the sysinfo Tool
	20. 37. 17.	Connect to Java DB (Derby) with org.apache.derby.jdbc.EmbeddedDriver
	20. 37. 18.	Connect to Derby database
	20. 37. 19.	The SQL script for creating the Employee Table

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