Apache Derby (previously distributed as IBM Cloudscape) is a

relational database management system A relational database is a (most commonly digital) database based on the relational model of data, as proposed by E. F. Codd in 1970. A system used to maintain relational databases is a relational database management system (RDBMS). Many relatio ...

(RDBMS) developed by the

Apache Software Foundation The Apache Software Foundation (ASF) is an American nonprofit corporation (classified as a 501(c)(3) organization in the United States) to support a number of open source software projects. The ASF was formed from a group of developers of the A ...

that can be embedded in Java programs and used for online transaction processing. It has a 3.5 MB disk-space footprint. Apache Derby is developed as an

open source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...

project under the Apache 2.0 license. For a time,

Oracle An oracle is a person or agency considered to provide wise and insightful counsel or prophetic predictions, most notably including precognition of the future, inspired by deities. As such, it is a form of divination. Description The word '' ...

distributed the same binaries under the name Java DB. In June 2015 they announced that for JDK 9 they would no longer be doing so.

History

Apache Derby originated at Cloudscape Inc, an

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California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...

, start-up founded in 1996 by Nat Wyatt and Howard Torf to develop Java database technology. The first release of the database engine, then called JBMS, was in 1997. Subsequently, the product was renamed Cloudscape and releases were made about every six months. In 1999 Informix Software, Inc., acquired Cloudscape, Inc. In 2001 IBM acquired the database assets of Informix Software, including Cloudscape. The database engine was re-branded to IBM Cloudscape and releases continued, mainly focusing on embedded use with IBM's Java products and middleware. In August 2004 IBM contributed the code to the Apache Software Foundation as Derby, an incubator project sponsored by the

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project. In July 2005 the Derby project graduated from the Apache incubator and is now being developed as a sub-project of the DB Top Level Project at Apache. Prior to Derby's graduation from incubation, Sun joined the Derby project with an intent to use Derby as a component in their own products, and with the release of Java 6 in December 2006, Sun started packaging Derby in the JDK branded as Java DB. In March 2007 IBM announced that they would withdraw marketing and support for the Cloudscape product, but would continue to contribute to the Apache Derby project. The Java DB database is Oracle's supported distribution of Apache Derby.

Technologies

Derby embedded database engine

The core of the technology, Derby's database engine, is a full-functioned relational embedded database-engine, supporting JDBC and SQL as programming APIs. It uses

IBM Db2 Db2 is a family of data management products, including database servers, developed by IBM. It initially supported the relational model, but was extended to support object–relational features and non-relational structures like JSON a ...

SQL syntax.

Derby Network Server

The Derby network server increases the reach of the Derby database engine by providing traditional client server functionality. The network server allows clients to connect over TCP/IP using the standard DRDA protocol. The network server allows the Derby engine to support networked JDBC,

ODBC In computing, Open Database Connectivity (ODBC) is a standard application programming interface (API) for accessing database management systems (DBMS). The designers of ODBC aimed to make it independent of database systems and operating systems. An ...

/ CLI, Perl.

Embedded Network Server

An embedded database can be configured to act as a hybrid server/embedded RDBMS; to also accept TCP/IP connections from other clients in addition to clients in the same JVM.see Embedded Server Example i
http://db.apache.org/derby/docs/10.4/adminguide/
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Database utilities

* ij: a tool that allows SQL scripts to be executed against any JDBC database. * dblook: Schema extraction tool for a Derby database. * sysinfo: Utility to display version numbers and class path.

References

Bibliography

External links

*
Internals of Derby, An Open Source Pure Java Relational Database Engine
deployable in an embedded OSGi environment
Oracle Java DB SiteWhy IBM is open sourcing Cloudscape as Derby
IBM developerWorks site
Compliance matrix with SQL 2003Configure and Install Derby Database
{{IBM FOSS

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Free database management systems Free software programmed in Java (programming language) IBM software Software using the Apache license