7 EJB Query Language

In EJB 2.0, you can specify query methods using the standardized query language, EJB Query Language (EJB QL).

Chapter 11 of the EJB 2.0 specification and various off-the-shelf books document EJB QL extensively. This chapter briefly overviews the development rules for these methods, but does not describe the EJB QL syntax in detail.

Refer to the EJB 2.0 specification and the following books for detailed syntax:

• Enterprise JavaBeans, 3rd Edition by Richard Monson-Haefel, O'Reilly Publishers

• Special Edition Using Enterprise JavaBeans 2.0 by Chuck Cavaness and Brian Keeton, Que Publishers

This chapter covers the following subjects:

• EJB QL Overview

• Query Methods Overview

• Deployment Descriptor Semantics

• Finder Method Example

• Select Method Example

• Oracle EJB QL Type Extensions: Date, Time, Timestamp, and SQRT